[ios] Deletes c/b/ui/ntp/recent_tabs.

Since the legacy recent_tabs and history code
has been deleted these views are no longer being used.


Bug: 807330
Cq-Include-Trybots: luci.chromium.try:ios-simulator-cronet;luci.chromium.try:ios-simulator-full-configs
Change-Id: I27af5f605f9088356b2e59566362be53710d45be
Reviewed-on: https://chromium-review.googlesource.com/c/1259425Reviewed-by: Justin Cohen <justincohen@chromium.org>
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596461}

ios/chrome/browser/ui/ntp/recent_tabs/OWNERS

-gambard@chromium.org
-sczs@chromium.org
-
-# TEAM: ios-directory-owners@chromium.org
-# OS: iOS

ios/chrome/browser/ui/ntp/recent_tabs/views/BUILD.gn

-# Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-source_set("views") {
-  configs += [ "//build/config/compiler:enable_arc" ]
-  sources = [
-    "disclosure_view.h",
-    "disclosure_view.mm",
-    "generic_section_header_view.h",
-    "generic_section_header_view.mm",
-    "header_of_collapsable_section_protocol.h",
-    "panel_bar_view.h",
-    "panel_bar_view.mm",
-    "session_section_header_view.h",
-    "session_section_header_view.mm",
-    "session_tab_data_view.h",
-    "session_tab_data_view.mm",
-    "show_full_history_view.h",
-    "show_full_history_view.mm",
-    "signed_in_sync_in_progress_view.h",
-    "signed_in_sync_in_progress_view.mm",
-    "signed_in_sync_off_view.h",
-    "signed_in_sync_off_view.mm",
-    "signed_in_sync_on_no_sessions_view.h",
-    "signed_in_sync_on_no_sessions_view.mm",
-    "spacers_view.h",
-    "spacers_view.mm",
-    "views_utils.h",
-    "views_utils.mm",
-  ]
-  deps = [
-    "//base",
-    "//components/browser_sync",
-    "//components/resources",
-    "//components/sessions",
-    "//components/strings",
-    "//components/sync",
-    "//components/sync_sessions",
-    "//ios/chrome/app/strings",
-    "//ios/chrome/app/theme:theme_grit",
-    "//ios/chrome/browser/browser_state",
-    "//ios/chrome/browser/favicon",
-    "//ios/chrome/browser/sync",
-    "//ios/chrome/browser/ui",
-    "//ios/chrome/browser/ui/commands",
-    "//ios/chrome/browser/ui/fancy_ui",
-    "//ios/chrome/browser/ui/material_components",
-    "//ios/chrome/browser/ui/recent_tabs:recent_tabs_ui",
-    "//ios/chrome/browser/ui/settings/sync_utils",
-    "//ios/chrome/common/favicon",
-    "//ios/third_party/material_components_ios",
-    "//ios/third_party/material_roboto_font_loader_ios",
-    "//ui/base",
-  ]
-  libs = [ "UIKit.framework" ]
-}

ios/chrome/browser/ui/ntp/recent_tabs/views/disclosure_view.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_DISCLOSURE_VIEW_H_
-#define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_DISCLOSURE_VIEW_H_
-
-#import <UIKit/UIKit.h>
-
-// View indicating whether a table view section is expanded or not.
-@interface DisclosureView : UIImageView
-
-// Designated initializer.
-- (instancetype)init;
-
-// Sets whether the view indicates that the section is collapsed or not, with an
-// animation or not.
-- (void)setTransformWhenCollapsed:(BOOL)collapsed animated:(BOOL)animated;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_DISCLOSURE_VIEW_H_

ios/chrome/browser/ui/ntp/recent_tabs/views/disclosure_view.mm

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ios/chrome/browser/ui/ntp/recent_tabs/views/disclosure_view.h"
-
-#include "base/numerics/math_constants.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// Animation duration for rotating the disclosure icon.
-const NSTimeInterval kDisclosureIconRotateDuration = 0.25;
-
-// Angles of the closure icon.
-// The rotation animation privileges rotating using the smallest angle. Setting
-// |kCollapsedIconAngle| to a value slightly less then 0 forces the animation to
-// always happen in the same half-plane.
-const CGFloat kCollapsedIconAngle = -0.00001;
-const CGFloat kExpandedIconAngle = base::kPiFloat;
-
-}  // anonymous namespace
-
-@implementation DisclosureView
-
-- (instancetype)init {
-  UIImage* arrowImage = [[UIImage imageNamed:@"ntp_opentabs_recent_arrow"]
-      imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
-  self = [super initWithImage:arrowImage];
-  return self;
-}
-
-- (void)setTransformWhenCollapsed:(BOOL)collapsed animated:(BOOL)animated {
-  CGFloat angle = collapsed ? kCollapsedIconAngle : kExpandedIconAngle;
-  if (animated) {
-    [UIView animateWithDuration:kDisclosureIconRotateDuration
-                     animations:^{
-                       self.transform = CGAffineTransformRotate(
-                           CGAffineTransformIdentity, angle);
-                     }];
-  } else {
-    self.transform = CGAffineTransformRotate(CGAffineTransformIdentity, angle);
-  }
-}
-
-@end

ios/chrome/browser/ui/ntp/recent_tabs/views/generic_section_header_view.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_GENERIC_SECTION_HEADER_VIEW_H_
-#define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_GENERIC_SECTION_HEADER_VIEW_H_
-
-#import <UIKit/UIKit.h>
-
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/header_of_collapsable_section_protocol.h"
-
-namespace recent_tabs {
-
-enum SectionHeaderType {
-  RECENTLY_CLOSED_TABS_SECTION_HEADER,
-  OTHER_DEVICES_SECTION_HEADER
-};
-
-}  // namespace recent_tabs
-
-// View for the generic section header.
-@interface GenericSectionHeaderView : UIView<HeaderOfCollapsableSectionProtocol>
-
-// Designated initializer.
-- (instancetype)initWithType:(recent_tabs::SectionHeaderType)type
-          sectionIsCollapsed:(BOOL)collapsed;
-
-// Returns the desired height when included in a UITableViewCell.
-+ (CGFloat)desiredHeightInUITableViewCell;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_GENERIC_SECTION_HEADER_VIEW_H_

ios/chrome/browser/ui/ntp/recent_tabs/views/generic_section_header_view.mm

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ios/chrome/browser/ui/ntp/recent_tabs/views/generic_section_header_view.h"
-
-#include "base/logging.h"
-#include "base/strings/sys_string_conversions.h"
-#include "ios/chrome/browser/ui/ntp/recent_tabs/views/disclosure_view.h"
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.h"
-#include "ios/chrome/browser/ui/recent_tabs/synced_sessions.h"
-#include "ios/chrome/browser/ui/rtl_geometry.h"
-#import "ios/chrome/common/ui_util/constraints_ui_util.h"
-#include "ios/chrome/grit/ios_strings.h"
-#import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
-#include "ui/base/l10n/l10n_util_mac.h"
-#include "ui/base/l10n/time_format.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// Desired height of the view.
-const CGFloat kDesiredHeight = 48;
-
-}  // namespace
-
-@interface GenericSectionHeaderView () {
-  DisclosureView* _disclosureView;
-  UIImageView* _icon;
-  UILabel* _label;
-}
-@end
-
-@implementation GenericSectionHeaderView
-
-- (instancetype)initWithFrame:(CGRect)aRect {
-  NOTREACHED();
-  return nil;
-}
-
-- (instancetype)initWithType:(recent_tabs::SectionHeaderType)type
-          sectionIsCollapsed:(BOOL)collapsed {
-  self = [super initWithFrame:CGRectZero];
-  if (self) {
-    _icon = [[UIImageView alloc] initWithImage:nil];
-    [_icon setTranslatesAutoresizingMaskIntoConstraints:NO];
-    _label = [[UILabel alloc] initWithFrame:CGRectZero];
-    [_label setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [_label setFont:[[MDCTypography fontLoader] regularFontOfSize:16]];
-    [_label setTextAlignment:NSTextAlignmentNatural];
-    [_label setBackgroundColor:[UIColor whiteColor]];
-
-    NSString* text = nil;
-    NSString* imageName = nil;
-    switch (type) {
-      case recent_tabs::RECENTLY_CLOSED_TABS_SECTION_HEADER:
-        text = l10n_util::GetNSString(IDS_IOS_RECENT_TABS_RECENTLY_CLOSED);
-        imageName = @"ntp_recently_closed";
-        break;
-      case recent_tabs::OTHER_DEVICES_SECTION_HEADER:
-        text = l10n_util::GetNSString(IDS_IOS_RECENT_TABS_OTHER_DEVICES);
-        imageName = @"ntp_opentabs_laptop";
-        break;
-    }
-    DCHECK(text);
-    DCHECK(imageName);
-    [_label setText:text];
-    [_icon setImage:
-               [[UIImage imageNamed:imageName]
-                   imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]];
-
-    self.isAccessibilityElement = YES;
-    self.accessibilityLabel = [_label accessibilityLabel];
-    self.accessibilityTraits |=
-        UIAccessibilityTraitButton | UIAccessibilityTraitHeader;
-
-    _disclosureView = [[DisclosureView alloc] init];
-    [_disclosureView setTranslatesAutoresizingMaskIntoConstraints:NO];
-
-    [self addSubview:_icon];
-    [self addSubview:_label];
-    [self addSubview:_disclosureView];
-
-    NSDictionary* viewsDictionary = @{
-      @"icon" : _icon,
-      @"label" : _label,
-      @"disclosureView" : _disclosureView,
-    };
-    NSArray* constraints = @[
-      @"H:|-16-[icon]-16-[label]-(>=16)-[disclosureView]-16-|",
-      @"V:|-12-[label]-12-|"
-    ];
-    ApplyVisualConstraints(constraints, viewsDictionary);
-    [self addConstraint:[NSLayoutConstraint
-                            constraintWithItem:_disclosureView
-                                     attribute:NSLayoutAttributeCenterY
-                                     relatedBy:NSLayoutRelationEqual
-                                        toItem:self
-                                     attribute:NSLayoutAttributeCenterY
-                                    multiplier:1.0
-                                      constant:0]];
-    [self addConstraint:[NSLayoutConstraint
-                            constraintWithItem:_icon
-                                     attribute:NSLayoutAttributeCenterY
-                                     relatedBy:NSLayoutRelationEqual
-                                        toItem:_label
-                                     attribute:NSLayoutAttributeCenterY
-                                    multiplier:1.0
-                                      constant:0]];
-    [self setSectionIsCollapsed:collapsed animated:NO];
-  }
-  return self;
-}
-
-+ (CGFloat)desiredHeightInUITableViewCell {
-  return kDesiredHeight;
-}
-
-#pragma mark - HeaderOfCollapsableSectionProtocol
-
-- (void)setSectionIsCollapsed:(BOOL)collapsed animated:(BOOL)animated {
-  [_disclosureView setTransformWhenCollapsed:collapsed animated:animated];
-  UIColor* tintColor = (collapsed ? recent_tabs::GetIconColorGray()
-                                  : recent_tabs::GetIconColorBlue());
-  [self setTintColor:tintColor];
-  UIColor* textColor = (collapsed ? recent_tabs::GetTextColorGray()
-                                  : recent_tabs::GetTextColorBlue());
-  [_label setTextColor:textColor];
-  self.accessibilityHint =
-      collapsed ? l10n_util::GetNSString(
-                      IDS_IOS_RECENT_TABS_DISCLOSURE_VIEW_COLLAPSED_HINT)
-                : l10n_util::GetNSString(
-                      IDS_IOS_RECENT_TABS_DISCLOSURE_VIEW_EXPANDED_HINT);
-}
-
-@end

ios/chrome/browser/ui/ntp/recent_tabs/views/header_of_collapsable_section_protocol.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_HEADER_OF_COLLAPSABLE_SECTION_PROTOCOL_H_
-#define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_HEADER_OF_COLLAPSABLE_SECTION_PROTOCOL_H_
-
-// Implemented by views that are headers of collapsable sections.
-@protocol HeaderOfCollapsableSectionProtocol
-
-// Sets whether the section is collapsed with or without animation.
-- (void)setSectionIsCollapsed:(BOOL)collapsed animated:(BOOL)animated;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_HEADER_OF_COLLAPSABLE_SECTION_PROTOCOL_H_

ios/chrome/browser/ui/ntp/recent_tabs/views/panel_bar_view.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_PANEL_BAR_VIEW_H_
-#define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_PANEL_BAR_VIEW_H_
-
-#import <UIKit/UIKit.h>
-
-// View for the bar located at the top of the Recent Tabs panel.
-@interface PanelBarView : UIView
-
-// Designated initializer.
-- (instancetype)init;
-
-// Sets the target/action of the close button.
-- (void)setCloseTarget:(id)target action:(SEL)action;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_PANEL_BAR_VIEW_H_

ios/chrome/browser/ui/ntp/recent_tabs/views/panel_bar_view.mm

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ios/chrome/browser/ui/ntp/recent_tabs/views/panel_bar_view.h"
-
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.h"
-#include "ios/chrome/browser/ui/rtl_geometry.h"
-#include "ios/chrome/browser/ui/ui_util.h"
-#import "ios/chrome/browser/ui/uikit_ui_util.h"
-#import "ios/chrome/common/ui_util/constraints_ui_util.h"
-#include "ios/chrome/grit/ios_strings.h"
-#import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
-#include "ui/base/l10n/l10n_util_mac.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-const int kBackgroundColor = 0xf2f2f2;
-const CGFloat kFontSize = 20;
-const CGFloat kSpacing = 16;
-
-}  // namespace
-
-@interface PanelBarView () {
-  UIButton* _closeButton;
-  NSLayoutConstraint* _statusBarSpacerConstraint;
-}
-// Whether the panel view extends throughout the whole screen. For example,
-// when presented fullscreen, the panel bar extends to the borders of the app
-// and the function returns YES.
-// When presented modally as on iPad and iPhone 6 Plus landscape, it returns NO.
-- (BOOL)coversFullAppWidth;
-@end
-
-@implementation PanelBarView
-
-- (instancetype)init {
-  self = [super initWithFrame:CGRectZero];
-  if (self) {
-    [self setBackgroundColor:UIColorFromRGB(kBackgroundColor)];
-    // Create and add the bar's title.
-    UILabel* title = [[UILabel alloc] initWithFrame:CGRectZero];
-    [title setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [title setFont:[[MDCTypography fontLoader] mediumFontOfSize:kFontSize]];
-    [title setTextColor:recent_tabs::GetTextColorGray()];
-    [title setTextAlignment:NSTextAlignmentNatural];
-    [title setText:l10n_util::GetNSString(IDS_IOS_NEW_TAB_RECENT_TABS)];
-    [title setBackgroundColor:UIColorFromRGB(kBackgroundColor)];
-    [self addSubview:title];
-
-    // Create and add the bar's close button.
-    _closeButton = [[UIButton alloc] initWithFrame:CGRectZero];
-    [_closeButton setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [_closeButton
-        setTitle:l10n_util::GetNSString(IDS_IOS_NAVIGATION_BAR_DONE_BUTTON)
-                     .uppercaseString
-        forState:UIControlStateNormal];
-    [_closeButton setTitleColor:recent_tabs::GetTextColorGray()
-                       forState:UIControlStateNormal];
-    [[_closeButton titleLabel] setFont:[MDCTypography buttonFont]];
-    [_closeButton setAccessibilityIdentifier:@"Exit"];
-    [self addSubview:_closeButton];
-
-    // Create and add the view that adds vertical padding that matches the
-    // status bar's height.
-    UIView* statusBarSpacer = [[UIView alloc] initWithFrame:CGRectZero];
-    [statusBarSpacer setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [self addSubview:statusBarSpacer];
-
-    // Add the constraints on all the subviews.
-    NSDictionary* viewsDictionary = @{
-      @"title" : title,
-      @"closeButton" : _closeButton,
-      @"statusBar" : statusBarSpacer,
-    };
-    NSArray* constraints = @[
-      @"V:|-0-[statusBar]-14-[closeButton]-13-|",
-      @"H:[title]-(>=0)-[closeButton]",
-    ];
-    ApplyVisualConstraints(constraints, viewsDictionary);
-    id<LayoutGuideProvider> safeAreaLayoutGuide =
-        SafeAreaLayoutGuideForView(self);
-    [NSLayoutConstraint activateConstraints:@[
-      [title.leadingAnchor
-          constraintEqualToAnchor:safeAreaLayoutGuide.leadingAnchor
-                         constant:kSpacing],
-      [_closeButton.trailingAnchor
-          constraintEqualToAnchor:safeAreaLayoutGuide.trailingAnchor
-                         constant:-kSpacing],
-    ]];
-    AddSameCenterYConstraint(self, title, _closeButton);
-    _statusBarSpacerConstraint =
-        [NSLayoutConstraint constraintWithItem:statusBarSpacer
-                                     attribute:NSLayoutAttributeHeight
-                                     relatedBy:NSLayoutRelationEqual
-                                        toItem:nil
-                                     attribute:NSLayoutAttributeNotAnAttribute
-                                    multiplier:1
-                                      constant:0];
-    [self addConstraint:_statusBarSpacerConstraint];
-  }
-  return self;
-}
-
-- (void)updateConstraints {
-  UIInterfaceOrientation orientation =
-      [[UIApplication sharedApplication] statusBarOrientation];
-  // On Plus phones in landscape, the modal is not fullscreen. The panel bar
-  // doesn't need to take the status bar into account.
-  BOOL takeStatusBarIntoAccount = [self coversFullAppWidth] ||
-                                  UIInterfaceOrientationIsPortrait(orientation);
-  if (takeStatusBarIntoAccount) {
-    CGFloat statusBarHeight = StatusBarHeight();
-    [_statusBarSpacerConstraint setConstant:statusBarHeight];
-  } else {
-    [_statusBarSpacerConstraint setConstant:0];
-  }
-  [super updateConstraints];
-}
-
-- (void)setCloseTarget:(id)target action:(SEL)action {
-  [_closeButton addTarget:target
-                   action:action
-         forControlEvents:UIControlEventTouchUpInside];
-}
-
-- (void)layoutSubviews {
-  [self setNeedsUpdateConstraints];
-  [super layoutSubviews];
-}
-
-- (BOOL)coversFullAppWidth {
-  return self.traitCollection.horizontalSizeClass ==
-         self.window.traitCollection.horizontalSizeClass;
-}
-
-@end

ios/chrome/browser/ui/ntp/recent_tabs/views/session_section_header_view.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SESSION_SECTION_HEADER_VIEW_H_
-#define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SESSION_SECTION_HEADER_VIEW_H_
-
-#import <UIKit/UIKit.h>
-
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/header_of_collapsable_section_protocol.h"
-
-namespace synced_sessions {
-class DistantSession;
-}  // namespace synced_sessions
-
-// View for the header of the sessions section.
-@interface SessionSectionHeaderView : UIView<HeaderOfCollapsableSectionProtocol>
-
-// Designated initializer.
-- (instancetype)initWithFrame:(CGRect)aRect sectionIsCollapsed:(BOOL)collapsed;
-
-// Updates view to display information for |distantSession|.
-- (void)updateWithSession:
-    (synced_sessions::DistantSession const*)distantSession;
-
-// Returns the desired height when included in a UITableViewCell.
-+ (CGFloat)desiredHeightInUITableViewCell;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SESSION_SECTION_HEADER_VIEW_H_

ios/chrome/browser/ui/ntp/recent_tabs/views/session_section_header_view.mm

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ios/chrome/browser/ui/ntp/recent_tabs/views/session_section_header_view.h"
-
-#include "base/logging.h"
-#include "base/strings/sys_string_conversions.h"
-#include "ios/chrome/browser/ui/ntp/recent_tabs/views/disclosure_view.h"
-#include "ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.h"
-#include "ios/chrome/browser/ui/recent_tabs/synced_sessions.h"
-#include "ios/chrome/browser/ui/rtl_geometry.h"
-#import "ios/chrome/common/ui_util/constraints_ui_util.h"
-#include "ios/chrome/grit/ios_strings.h"
-#import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
-#include "ui/base/l10n/l10n_util_mac.h"
-#include "ui/base/l10n/time_format.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// Desired height of the view.
-const CGFloat kDesiredHeight = 72;
-
-// The UI displays relative time for up to this number of hours and then
-// switches to absolute values.
-const int kRelativeTimeMaxHours = 4;
-
-}  // namespace
-
-@interface SessionSectionHeaderView () {
-  UIImageView* _deviceIcon;
-  UILabel* _nameLabel;
-  UILabel* _timeLabel;
-  DisclosureView* _disclosureView;
-}
-
-// Returns a relative string (e.g. 15 mins ago) if the time passed in is within
-// the last 4 hours. Returns the full formatted time in short style otherwise.
-- (NSString*)relativeTimeStringForTime:(base::Time)time;
-
-@end
-
-@implementation SessionSectionHeaderView
-
-- (instancetype)initWithFrame:(CGRect)aRect sectionIsCollapsed:(BOOL)collapsed {
-  self = [super initWithFrame:aRect];
-  if (self) {
-    _deviceIcon = [[UIImageView alloc] initWithImage:nil];
-    [_deviceIcon setTranslatesAutoresizingMaskIntoConstraints:NO];
-
-    _nameLabel = [[UILabel alloc] initWithFrame:CGRectZero];
-    [_nameLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [_nameLabel setHighlightedTextColor:[_nameLabel textColor]];
-    [_nameLabel setTextAlignment:NSTextAlignmentNatural];
-    [_nameLabel setFont:[[MDCTypography fontLoader] regularFontOfSize:16]];
-    [_nameLabel setBackgroundColor:[UIColor whiteColor]];
-    [_nameLabel
-        setContentCompressionResistancePriority:UILayoutPriorityDefaultLow
-                                        forAxis:
-                                            UILayoutConstraintAxisHorizontal];
-
-    _timeLabel = [[UILabel alloc] initWithFrame:CGRectZero];
-    [_timeLabel setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [_timeLabel setTextAlignment:NSTextAlignmentNatural];
-    [_timeLabel setFont:[MDCTypography captionFont]];
-    [_timeLabel setHighlightedTextColor:[_timeLabel textColor]];
-    [_timeLabel setBackgroundColor:[UIColor whiteColor]];
-
-    _disclosureView = [[DisclosureView alloc] init];
-    [_disclosureView setTranslatesAutoresizingMaskIntoConstraints:NO];
-
-    [self addSubview:_deviceIcon];
-    [self addSubview:_nameLabel];
-    [self addSubview:_timeLabel];
-    [self addSubview:_disclosureView];
-
-    NSDictionary* viewsDictionary = @{
-      @"deviceIcon" : _deviceIcon,
-      @"nameLabel" : _nameLabel,
-      @"timeLabel" : _timeLabel,
-      @"disclosureView" : _disclosureView,
-    };
-
-    NSArray* constraints = @[
-      @"H:|-16-[deviceIcon]-16-[nameLabel]-(>=16)-[disclosureView]-16-|",
-      @"V:|-16-[nameLabel]-5-[timeLabel]-16-|",
-      @"H:[deviceIcon]-16-[timeLabel]",
-    ];
-    ApplyVisualConstraints(constraints, viewsDictionary);
-    [self addConstraint:[NSLayoutConstraint
-                            constraintWithItem:_disclosureView
-                                     attribute:NSLayoutAttributeCenterY
-                                     relatedBy:NSLayoutRelationEqual
-                                        toItem:self
-                                     attribute:NSLayoutAttributeCenterY
-                                    multiplier:1.0
-                                      constant:0]];
-    [self addConstraint:[NSLayoutConstraint
-                            constraintWithItem:_deviceIcon
-                                     attribute:NSLayoutAttributeCenterY
-                                     relatedBy:NSLayoutRelationEqual
-                                        toItem:_nameLabel
-                                     attribute:NSLayoutAttributeCenterY
-                                    multiplier:1.0
-                                      constant:0]];
-    [self setSectionIsCollapsed:collapsed animated:NO];
-  }
-  // TODO(jif): Add timer that refreshes the time label.
-  return self;
-}
-
-- (void)updateWithSession:
-    (synced_sessions::DistantSession const*)distantSession {
-  NSString* imageName = nil;
-  switch (distantSession->device_type) {
-    case sync_pb::SyncEnums::TYPE_PHONE:
-      imageName = @"ntp_opentabs_phone";
-      break;
-    case sync_pb::SyncEnums::TYPE_TABLET:
-      imageName = @"ntp_opentabs_tablet";
-      break;
-    default:
-      imageName = @"ntp_opentabs_laptop";
-      break;
-  }
-  [_deviceIcon
-      setImage:[[UIImage imageNamed:imageName]
-                   imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]];
-  [_nameLabel setText:base::SysUTF8ToNSString(distantSession->name)];
-
-  NSDate* lastUsedDate = [NSDate
-      dateWithTimeIntervalSince1970:distantSession->modified_time.ToTimeT()];
-  NSString* timeString =
-      [self relativeTimeStringForTime:distantSession->modified_time];
-  NSString* dateString =
-      [NSDateFormatter localizedStringFromDate:lastUsedDate
-                                     dateStyle:NSDateFormatterShortStyle
-                                     timeStyle:NSDateFormatterNoStyle];
-  NSString* timeDateString =
-      [NSString stringWithFormat:@"%@ %@", timeString, dateString];
-
-  [_timeLabel setText:l10n_util::GetNSStringF(
-                          IDS_IOS_OPEN_TABS_LAST_USED,
-                          base::SysNSStringToUTF16(timeDateString))];
-}
-
-- (NSString*)relativeTimeStringForTime:(base::Time)time {
-  base::TimeDelta last_used_delta;
-  if (base::Time::Now() > time)
-    last_used_delta = base::Time::Now() - time;
-  if (last_used_delta.ToInternalValue() < base::Time::kMicrosecondsPerMinute)
-    return l10n_util::GetNSString(IDS_IOS_OPEN_TABS_RECENTLY_SYNCED);
-  if (last_used_delta.InHours() < kRelativeTimeMaxHours) {
-    return base::SysUTF16ToNSString(
-        ui::TimeFormat::Simple(ui::TimeFormat::FORMAT_ELAPSED,
-                               ui::TimeFormat::LENGTH_SHORT, last_used_delta));
-  }
-  NSDate* date = [NSDate dateWithTimeIntervalSince1970:time.ToTimeT()];
-  return [NSDateFormatter localizedStringFromDate:date
-                                        dateStyle:NSDateFormatterNoStyle
-                                        timeStyle:NSDateFormatterShortStyle];
-}
-
-+ (CGFloat)desiredHeightInUITableViewCell {
-  return kDesiredHeight;
-}
-
-#pragma mark - HeaderOfCollapsableSectionProtocol
-
-- (void)setSectionIsCollapsed:(BOOL)collapsed animated:(BOOL)animated {
-  [_disclosureView setTransformWhenCollapsed:collapsed animated:animated];
-  UIColor* tintColor = (collapsed ? recent_tabs::GetIconColorGray()
-                                  : recent_tabs::GetIconColorBlue());
-  [self setTintColor:tintColor];
-  UIColor* textColor = (collapsed ? recent_tabs::GetTextColorGray()
-                                  : recent_tabs::GetTextColorBlue());
-  [_nameLabel setTextColor:textColor];
-  UIColor* subtitleColor = (collapsed ? recent_tabs::GetSubtitleColorGray()
-                                      : recent_tabs::GetSubtitleColorBlue());
-  [_timeLabel setTextColor:subtitleColor];
-}
-
-@end

ios/chrome/browser/ui/ntp/recent_tabs/views/session_tab_data_view.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SESSION_TAB_DATA_VIEW_H_
-#define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SESSION_TAB_DATA_VIEW_H_
-
-#import <UIKit/UIKit.h>
-
-#include "components/sessions/core/tab_restore_service.h"
-
-namespace ios {
-class ChromeBrowserState;
-}
-
-namespace synced_sessions {
-struct DistantTab;
-}
-
-class GURL;
-
-// View displaying a tab's title and favicon.
-@interface SessionTabDataView : UIView
-
-// Designated initializer.
-- (instancetype)initWithFrame:(CGRect)aRect;
-
-// Updates view to display information for the |distantTab| using |browserState|
-// to obtain favicons. |browserState| and |distantTab| must not be nil.
-- (void)updateWithDistantTab:(synced_sessions::DistantTab const*)distantTab
-                browserState:(ios::ChromeBrowserState*)browserState;
-
-// Updates view to display information for the |entry| using |browserState| to
-// obtain favicons. |browserState| and |entry| must not be nil.
-- (void)updateWithTabRestoreEntry:
-            (const sessions::TabRestoreService::Entry*)entry
-                     browserState:(ios::ChromeBrowserState*)browserState;
-
-// Updates view to display the |text| and |url| using |browserState| to obtain
-// favicons. |text| and |browserState| must not be nil.
-- (void)setText:(NSString*)text
-             url:(const GURL&)url
-    browserState:(ios::ChromeBrowserState*)browserState;
-
-// Returns the desired height when included in a UITableViewCell.
-+ (CGFloat)desiredHeightInUITableViewCell;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SESSION_TAB_DATA_VIEW_H_

ios/chrome/browser/ui/ntp/recent_tabs/views/session_tab_data_view.mm

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ios/chrome/browser/ui/ntp/recent_tabs/views/session_tab_data_view.h"
-
-#include "base/logging.h"
-#include "base/strings/sys_string_conversions.h"
-#include "components/grit/components_scaled_resources.h"
-#import "ios/chrome/browser/favicon/favicon_loader.h"
-#include "ios/chrome/browser/favicon/ios_chrome_favicon_loader_factory.h"
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.h"
-#include "ios/chrome/browser/ui/recent_tabs/synced_sessions.h"
-#include "ios/chrome/browser/ui/rtl_geometry.h"
-#import "ios/chrome/common/favicon/favicon_attributes.h"
-#import "ios/chrome/common/favicon/favicon_view.h"
-#import "ios/chrome/common/ui_util/constraints_ui_util.h"
-#import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
-#include "ui/base/resource/resource_bundle.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// Desired height of the view.
-const CGFloat kDesiredHeight = 48;
-
-}  // namespace
-
-@interface SessionTabDataView () {
-  FaviconViewNew* _favicon;
-  UILabel* _label;
-}
-@end
-
-@implementation SessionTabDataView
-
-- (instancetype)initWithFrame:(CGRect)aRect {
-  self = [super initWithFrame:aRect];
-  if (self) {
-    _favicon = [[FaviconViewNew alloc] init];
-    [_favicon setTranslatesAutoresizingMaskIntoConstraints:NO];
-
-    _label = [[UILabel alloc] initWithFrame:CGRectZero];
-    [_label setLineBreakMode:NSLineBreakByTruncatingTail];
-    [_label setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [_label setFont:[[MDCTypography fontLoader] regularFontOfSize:16]];
-    [_label setTextAlignment:NSTextAlignmentNatural];
-    [_label setTextColor:recent_tabs::GetTextColorGray()];
-    [_label setHighlightedTextColor:[_label textColor]];
-    [_label setBackgroundColor:[UIColor whiteColor]];
-
-    self.isAccessibilityElement = YES;
-    self.accessibilityTraits |= UIAccessibilityTraitButton;
-
-    [self addSubview:_favicon];
-    [self addSubview:_label];
-
-    NSDictionary* viewsDictionary = @{
-      @"favicon" : _favicon,
-      @"label" : _label,
-    };
-
-    NSArray* constraints = @[
-      @"H:|-56-[favicon(==16)]-16-[label]-16-|",
-      @"V:|-(>=0)-[favicon(==16)]-(>=0)-|"
-    ];
-    ApplyVisualConstraints(constraints, viewsDictionary);
-
-    [self addConstraint:[NSLayoutConstraint
-                            constraintWithItem:_favicon
-                                     attribute:NSLayoutAttributeCenterY
-                                     relatedBy:NSLayoutRelationEqual
-                                        toItem:self
-                                     attribute:NSLayoutAttributeCenterY
-                                    multiplier:1.0
-                                      constant:0]];
-    [self addConstraint:[NSLayoutConstraint
-                            constraintWithItem:_label
-                                     attribute:NSLayoutAttributeCenterY
-                                     relatedBy:NSLayoutRelationEqual
-                                        toItem:self
-                                     attribute:NSLayoutAttributeCenterY
-                                    multiplier:1.0
-                                      constant:0]];
-  }
-  return self;
-}
-
-- (void)updateWithDistantTab:(synced_sessions::DistantTab const*)distantTab
-                browserState:(ios::ChromeBrowserState*)browserState {
-  DCHECK(distantTab);
-  DCHECK(browserState);
-  NSString* text = base::SysUTF16ToNSString(distantTab->title);
-  GURL url = distantTab->virtual_url;
-  [self setText:text url:url browserState:browserState];
-}
-
-- (void)setText:(NSString*)text
-             url:(const GURL&)url
-    browserState:(ios::ChromeBrowserState*)browserState {
-  DCHECK(text);
-  DCHECK(browserState);
-  [_label setText:text];
-  self.accessibilityLabel = [_label accessibilityLabel];
-  recent_tabs::GetFavicon(url, browserState, ^(FaviconAttributes* attributes) {
-    [_favicon configureWithAttributes:attributes];
-  });
-}
-
-- (void)updateWithTabRestoreEntry:
-            (const sessions::TabRestoreService::Entry*)entry
-                     browserState:(ios::ChromeBrowserState*)browserState {
-  DCHECK(entry);
-  DCHECK(browserState);
-  switch (entry->type) {
-    case sessions::TabRestoreService::TAB: {
-      const sessions::TabRestoreService::Tab* tab =
-          static_cast<const sessions::TabRestoreService::Tab*>(entry);
-      const sessions::SerializedNavigationEntry& entry =
-          tab->navigations[tab->current_navigation_index];
-      // Use the page's title for the label, or its URL if title is empty.
-      NSString* text;
-      if (entry.title().size()) {
-        text = base::SysUTF16ToNSString(entry.title());
-      } else {
-        text = base::SysUTF8ToNSString(entry.virtual_url().spec());
-      }
-      [self setText:text url:entry.virtual_url() browserState:browserState];
-      break;
-    }
-    case sessions::TabRestoreService::WINDOW: {
-      // We only handle the TAB type.
-      NOTREACHED() << "TabRestoreService WINDOW session type is invalid.";
-      break;
-    }
-  }
-}
-
-+ (CGFloat)desiredHeightInUITableViewCell {
-  return kDesiredHeight;
-}
-
-@end

ios/chrome/browser/ui/ntp/recent_tabs/views/show_full_history_view.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SHOW_FULL_HISTORY_VIEW_H_
-#define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SHOW_FULL_HISTORY_VIEW_H_
-
-#import <UIKit/UIKit.h>
-
-// View offering to display the full history.
-@interface ShowFullHistoryView : UIView
-
-// Designated initializer.
-- (instancetype)initWithFrame:(CGRect)aRect;
-
-// Returns the desired height when included in a UITableViewCell.
-+ (CGFloat)desiredHeightInUITableViewCell;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SHOW_FULL_HISTORY_VIEW_H_

ios/chrome/browser/ui/ntp/recent_tabs/views/show_full_history_view.mm

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "ios/chrome/browser/ui/ntp/recent_tabs/views/show_full_history_view.h"
-
-#include "components/strings/grit/components_strings.h"
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.h"
-#include "ios/chrome/browser/ui/rtl_geometry.h"
-#import "ios/chrome/common/ui_util/constraints_ui_util.h"
-#import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
-#import "ui/base/l10n/l10n_util.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// Desired height of the view.
-const CGFloat kDesiredHeight = 48;
-
-}  // namespace
-
-@implementation ShowFullHistoryView
-
-- (instancetype)initWithFrame:(CGRect)aRect {
-  self = [super initWithFrame:aRect];
-  if (self) {
-    UIImageView* icon = [[UIImageView alloc] initWithImage:nil];
-    [icon setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [icon setImage:[UIImage imageNamed:@"ntp_opentabs_clock"]];
-
-    UILabel* label = [[UILabel alloc] initWithFrame:CGRectZero];
-    [label setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [label setFont:[[MDCTypography fontLoader] regularFontOfSize:16]];
-    [label setTextAlignment:NSTextAlignmentNatural];
-    [label setTextColor:recent_tabs::GetTextColorGray()];
-    [label setText:l10n_util::GetNSString(IDS_HISTORY_SHOWFULLHISTORY_LINK)];
-    [label setBackgroundColor:[UIColor whiteColor]];
-
-    [self addSubview:icon];
-    [self addSubview:label];
-
-    self.isAccessibilityElement = YES;
-    self.accessibilityLabel = label.text;
-    self.accessibilityTraits |= UIAccessibilityTraitButton;
-
-    NSDictionary* viewsDictionary = @{
-      @"icon" : icon,
-      @"label" : label,
-    };
-    NSArray* constraints =
-        @[ @"H:|-56-[icon(==16)]-16-[label]-(>=16)-|", @"V:[icon(==16)]" ];
-    ApplyVisualConstraints(constraints, viewsDictionary);
-    [self addConstraint:[NSLayoutConstraint
-                            constraintWithItem:icon
-                                     attribute:NSLayoutAttributeCenterY
-                                     relatedBy:NSLayoutRelationEqual
-                                        toItem:self
-                                     attribute:NSLayoutAttributeCenterY
-                                    multiplier:1.0
-                                      constant:0]];
-    [self addConstraint:[NSLayoutConstraint
-                            constraintWithItem:label
-                                     attribute:NSLayoutAttributeCenterY
-                                     relatedBy:NSLayoutRelationEqual
-                                        toItem:self
-                                     attribute:NSLayoutAttributeCenterY
-                                    multiplier:1.0
-                                      constant:0]];
-  }
-  return self;
-}
-
-+ (CGFloat)desiredHeightInUITableViewCell {
-  return kDesiredHeight;
-}
-
-@end

ios/chrome/browser/ui/ntp/recent_tabs/views/signed_in_sync_in_progress_view.h

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SIGNED_IN_SYNC_IN_PROGRESS_VIEW_H_
-#define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SIGNED_IN_SYNC_IN_PROGRESS_VIEW_H_
-
-#import <UIKit/UIKit.h>
-
-// View indicating that the syncing is currently occurring.
-@interface SignedInSyncInProgressView : UIView
-
-// Designated initializer.
-- (instancetype)initWithFrame:(CGRect)aRect;
-
-// Returns the desired height when included in a UITableViewCell.
-+ (CGFloat)desiredHeightInUITableViewCell;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SIGNED_IN_SYNC_IN_PROGRESS_VIEW_H_

ios/chrome/browser/ui/ntp/recent_tabs/views/signed_in_sync_in_progress_view.mm

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/signed_in_sync_in_progress_view.h"
-
-#import "ios/chrome/browser/ui/material_components/activity_indicator.h"
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.h"
-#import "ios/chrome/common/ui_util/constraints_ui_util.h"
-#include "ios/chrome/grit/ios_strings.h"
-#import "ios/third_party/material_components_ios/src/components/ActivityIndicator/src/MaterialActivityIndicator.h"
-#import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
-#include "ui/base/l10n/l10n_util.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// Desired height of the view.
-const CGFloat kDesiredHeight = 48;
-
-}  // anonymous namespace
-
-@implementation SignedInSyncInProgressView
-
-- (instancetype)initWithFrame:(CGRect)aRect {
-  self = [super initWithFrame:CGRectZero];
-  if (self) {
-    MDCActivityIndicator* activityIndicator;
-    UIImageView* icon;
-    UILabel* label;
-
-    icon = [[UIImageView alloc] initWithImage:nil];
-    [icon setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [icon setImage:
-              [[UIImage imageNamed:@"ntp_opentabs_laptop"]
-                  imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]];
-
-    label = [[UILabel alloc] initWithFrame:CGRectZero];
-    [label setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [label setFont:[[MDCTypography fontLoader] regularFontOfSize:16]];
-    [label setText:l10n_util::GetNSString(IDS_IOS_RECENT_TABS_OTHER_DEVICES)];
-    [label setBackgroundColor:[UIColor whiteColor]];
-
-    activityIndicator = [[MDCActivityIndicator alloc] initWithFrame:CGRectZero];
-    [activityIndicator setCycleColors:ActivityIndicatorBrandedCycleColors()];
-    [activityIndicator setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [activityIndicator startAnimating];
-
-    self.tintColor = recent_tabs::GetIconColorGray();
-    self.isAccessibilityElement = YES;
-    self.accessibilityLabel = [label accessibilityLabel];
-    self.accessibilityTraits |=
-        UIAccessibilityTraitButton | UIAccessibilityTraitHeader;
-
-    [self addSubview:icon];
-    [self addSubview:label];
-    [self addSubview:activityIndicator];
-
-    NSDictionary* viewsDictionary = @{
-      @"icon" : icon,
-      @"label" : label,
-      @"activityIndicator" : activityIndicator,
-    };
-    NSArray* constraints = @[
-      @"H:|-16-[icon]-16-[label]-(>=16)-[activityIndicator(16)]-20-|",
-      @"V:|-12-[label]-12-|",
-      @"V:[activityIndicator(16)]",
-    ];
-    ApplyVisualConstraints(constraints, viewsDictionary);
-    [self addConstraint:[NSLayoutConstraint
-                            constraintWithItem:activityIndicator
-                                     attribute:NSLayoutAttributeCenterY
-                                     relatedBy:NSLayoutRelationEqual
-                                        toItem:self
-                                     attribute:NSLayoutAttributeCenterY
-                                    multiplier:1.0
-                                      constant:0]];
-    [self addConstraint:[NSLayoutConstraint
-                            constraintWithItem:icon
-                                     attribute:NSLayoutAttributeCenterY
-                                     relatedBy:NSLayoutRelationEqual
-                                        toItem:label
-                                     attribute:NSLayoutAttributeCenterY
-                                    multiplier:1.0
-                                      constant:0]];
-  }
-  return self;
-}
-
-+ (CGFloat)desiredHeightInUITableViewCell {
-  return kDesiredHeight;
-}
-
-@end

ios/chrome/browser/ui/ntp/recent_tabs/views/signed_in_sync_off_view.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SIGNED_IN_SYNC_OFF_VIEW_H_
-#define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SIGNED_IN_SYNC_OFF_VIEW_H_
-
-#import <UIKit/UIKit.h>
-
-@protocol SyncPresenter;
-
-namespace ios {
-class ChromeBrowserState;
-}
-
-// View displaying a tab's title and favicon.
-@interface SignedInSyncOffView : UIView
-
-// Designated initializer.
-- (instancetype)initWithFrame:(CGRect)aRect
-                 browserState:(ios::ChromeBrowserState*)browserState
-                    presenter:(id<SyncPresenter>)presenter
-    NS_DESIGNATED_INITIALIZER;
-
-- (instancetype)initWithFrame:(CGRect)frame NS_UNAVAILABLE;
-- (instancetype)initWithCoder:(NSCoder*)aDecoder NS_UNAVAILABLE;
-
-// Returns the desired height when included in a UITableViewCell.
-+ (CGFloat)desiredHeightInUITableViewCell;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SIGNED_IN_SYNC_OFF_VIEW_H_

ios/chrome/browser/ui/ntp/recent_tabs/views/signed_in_sync_off_view.mm

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/signed_in_sync_off_view.h"
-
-#include "base/logging.h"
-#import "ios/chrome/browser/ui/fancy_ui/primary_action_button.h"
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.h"
-#include "ios/chrome/browser/ui/rtl_geometry.h"
-#import "ios/chrome/browser/ui/settings/sync_utils/sync_presenter.h"
-#import "ios/chrome/browser/ui/settings/sync_utils/sync_util.h"
-#import "ios/chrome/common/ui_util/constraints_ui_util.h"
-#include "ios/chrome/grit/ios_chromium_strings.h"
-#include "ios/chrome/grit/ios_strings.h"
-#import "ui/base/l10n/l10n_util.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// Desired height of the view.
-const CGFloat kDesiredHeight = 180;
-
-}  // anonymous namespace
-
-@interface SignedInSyncOffView ()
-// Presenter for displaying UI.
-@property(nonatomic, readonly, weak) id<SyncPresenter> presenter;
-@end
-
-@implementation SignedInSyncOffView {
-  ios::ChromeBrowserState* _browserState;  // Weak.
-}
-@synthesize presenter = _presenter;
-
-- (instancetype)initWithFrame:(CGRect)aRect
-                 browserState:(ios::ChromeBrowserState*)browserState
-                    presenter:(id<SyncPresenter>)presenter {
-  self = [super initWithFrame:CGRectZero];
-  if (self) {
-    _browserState = browserState;
-    _presenter = presenter;
-    // Create and add sign in label.
-    UILabel* enableSyncLabel = recent_tabs::CreateMultilineLabel(
-        l10n_util::GetNSString(IDS_IOS_OPEN_TABS_SYNC_IS_OFF_MOBILE));
-    [self addSubview:enableSyncLabel];
-
-    // Create and add sign in button.
-    PrimaryActionButton* enableSyncButton = [[PrimaryActionButton alloc] init];
-    [enableSyncButton setTranslatesAutoresizingMaskIntoConstraints:NO];
-    [enableSyncButton
-        setTitle:l10n_util::GetNSString(IDS_IOS_OPEN_TABS_ENABLE_SYNC_MOBILE)
-        forState:UIControlStateNormal];
-    [enableSyncButton addTarget:self
-                         action:@selector(showSyncSettings)
-               forControlEvents:UIControlEventTouchUpInside];
-    [self addSubview:enableSyncButton];
-
-    // Set constraints on label and button.
-    NSDictionary* viewsDictionary = @{
-      @"label" : enableSyncLabel,
-      @"button" : enableSyncButton,
-    };
-    // clang-format off
-    NSArray* constraints = @[
-      @"V:|-16-[label]-16-[button]-(>=16)-|",
-      @"H:|-16-[label]-16-|",
-      @"H:|-(>=16)-[button]-16-|"
-    ];
-    // clang-format on
-    ApplyVisualConstraints(constraints, viewsDictionary);
-  }
-  return self;
-}
-
-+ (CGFloat)desiredHeightInUITableViewCell {
-  return kDesiredHeight;
-}
-
-- (void)showSyncSettings {
-  SyncSetupService::SyncServiceState syncState =
-      GetSyncStateForBrowserState(_browserState);
-  if (ShouldShowSyncSignin(syncState)) {
-    [self.presenter showReauthenticateSignin];
-  } else if (ShouldShowSyncSettings(syncState)) {
-    [self.presenter showSyncSettings];
-  } else if (ShouldShowSyncPassphraseSettings(syncState)) {
-    [self.presenter showSyncPassphraseSettings];
-  }
-}
-
-@end

ios/chrome/browser/ui/ntp/recent_tabs/views/signed_in_sync_on_no_sessions_view.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SIGNED_IN_SYNC_ON_NO_SESSIONS_VIEW_H_
-#define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SIGNED_IN_SYNC_ON_NO_SESSIONS_VIEW_H_
-
-#import <UIKit/UIKit.h>
-
-// View indicating when a user is signed in and has sync activated, but has no
-// sessions.
-@interface SignedInSyncOnNoSessionsView : UIView
-
-// Designated initializer.
-- (instancetype)initWithFrame:(CGRect)aRect;
-
-// Returns the desired height when included in a UITableViewCell.
-+ (CGFloat)desiredHeightInUITableViewCell;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SIGNED_IN_SYNC_ON_NO_SESSIONS_VIEW_H_

ios/chrome/browser/ui/ntp/recent_tabs/views/signed_in_sync_on_no_sessions_view.mm

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/signed_in_sync_on_no_sessions_view.h"
-
-#include "base/logging.h"
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.h"
-#include "ios/chrome/browser/ui/rtl_geometry.h"
-#import "ios/chrome/common/ui_util/constraints_ui_util.h"
-#include "ios/chrome/grit/ios_chromium_strings.h"
-#include "ios/chrome/grit/ios_strings.h"
-#include "ui/base/l10n/l10n_util.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// Desired height of the view.
-const CGFloat kDesiredHeight = 130;
-
-}  // anonymous namespace
-
-@implementation SignedInSyncOnNoSessionsView
-
-- (instancetype)initWithFrame:(CGRect)aRect {
-  self = [super initWithFrame:CGRectZero];
-  if (self) {
-    // Create and add the label.
-    UILabel* noSessionLabel = recent_tabs::CreateMultilineLabel(
-        l10n_util::GetNSString(IDS_IOS_OPEN_TABS_NO_SESSION_INSTRUCTIONS));
-    [self addSubview:noSessionLabel];
-
-    // Set constraints on the label.
-    NSDictionary* viewsDictionary = @{ @"label" : noSessionLabel };
-    NSArray* constraints =
-        @[ @"V:|-16-[label]-(>=16)-|", @"H:|-16-[label]-16-|" ];
-    ApplyVisualConstraints(constraints, viewsDictionary);
-  }
-  return self;
-}
-
-+ (CGFloat)desiredHeightInUITableViewCell {
-  return kDesiredHeight;
-}
-
-@end

ios/chrome/browser/ui/ntp/recent_tabs/views/spacers_view.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SPACERS_VIEW_H_
-#define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SPACERS_VIEW_H_
-
-#import <UIKit/UIKit.h>
-
-// View adding space at the top of the Recent Tabs view.
-@interface RecentlyTabsTopSpacingHeader : UIView
-
-// Returns the desired height when included in a UITableViewCell.
-+ (CGFloat)desiredHeightInUITableViewCell;
-
-@end
-
-// View adding space at the bottom of the Recently Closed section.
-@interface RecentlyClosedSectionFooter : UIView
-
-// Designated initializer.
-- (instancetype)initWithFrame:(CGRect)aRect;
-
-// Returns the desired height when included in a UITableViewCell.
-+ (CGFloat)desiredHeightInUITableViewCell;
-
-@end
-
-#endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_SPACERS_VIEW_H_

ios/chrome/browser/ui/ntp/recent_tabs/views/spacers_view.mm

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/spacers_view.h"
-
-#include "base/logging.h"
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.h"
-#include "ios/chrome/browser/ui/ui_util.h"
-#import "ios/chrome/browser/ui/uikit_ui_util.h"
-#import "ios/chrome/common/ui_util/constraints_ui_util.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// Desired height of the view.
-const CGFloat kHeaderDesiredHeightIPhone = 8;
-const CGFloat kHeaderDesiredHeightIPad = 48;
-const CGFloat kFooterDesiredHeight = 17;
-
-// Text color.
-const int kSeparatorColor = 0x5a5a5a;
-const CGFloat kSeparatorAlpha = 0.1;
-
-}  // namespace
-
-@implementation RecentlyTabsTopSpacingHeader
-
-+ (CGFloat)desiredHeightInUITableViewCell {
-  if (IsIPadIdiom()) {
-    return kHeaderDesiredHeightIPad;
-  } else {
-    return kHeaderDesiredHeightIPhone;
-  }
-}
-
-@end
-
-@implementation RecentlyClosedSectionFooter
-
-- (instancetype)initWithFrame:(CGRect)aRect {
-  self = [super initWithFrame:CGRectZero];
-  if (self) {
-    // Create and add separator.
-    UIView* separator = [[UIView alloc] init];
-    [separator setTranslatesAutoresizingMaskIntoConstraints:NO];
-    UIColor* separatorColor = UIColorFromRGB(kSeparatorColor, kSeparatorAlpha);
-    [separator setBackgroundColor:separatorColor];
-    [self addSubview:separator];
-
-    // Set constraints on separator.
-    NSDictionary* viewsDictionary = @{ @"separator" : separator };
-    // This set of constraints should match the constraints set on the
-    // RecentTabsTableViewController.
-    // clang-format off
-    NSArray* constraints = @[
-      @"V:|-(8)-[separator(==1)]",
-      @"H:|-(16)-[separator(<=516)]-(16)-|",
-      @"H:[separator(==516@500)]"
-    ];
-    // clang-format on
-    [self addConstraint:[NSLayoutConstraint
-                            constraintWithItem:separator
-                                     attribute:NSLayoutAttributeCenterX
-                                     relatedBy:NSLayoutRelationEqual
-                                        toItem:self
-                                     attribute:NSLayoutAttributeCenterX
-                                    multiplier:1
-                                      constant:0]];
-    ApplyVisualConstraints(constraints, viewsDictionary);
-  }
-  return self;
-}
-
-+ (CGFloat)desiredHeightInUITableViewCell {
-  return kFooterDesiredHeight;
-}
-
-@end

ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_VIEWS_UTILS_H_
-#define IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_VIEWS_UTILS_H_
-
-#import <UIKit/UIKit.h>
-
-class GURL;
-@class FaviconAttributes;
-@class UIImage;
-
-namespace ios {
-class ChromeBrowserState;
-}  // namespace ios
-
-typedef void (^FaviconGetterCompletionBlock)(FaviconAttributes*);
-
-namespace recent_tabs {
-
-// Returns an autoreleased UILabel.
-UILabel* CreateMultilineLabel(NSString* text);
-
-// Color helpers.
-UIColor* GetTextColorBlue();
-UIColor* GetTextColorGray();
-UIColor* GetSubtitleColorBlue();
-UIColor* GetSubtitleColorGray();
-UIColor* GetIconColorBlue();
-UIColor* GetIconColorGray();
-
-// Gets the favicon for |url|, calls |block| when loaded.
-void GetFavicon(GURL const& url,
-                ios::ChromeBrowserState* browserState,
-                FaviconGetterCompletionBlock block);
-}  // namespace recent_tabs
-
-#endif  // IOS_CHROME_BROWSER_UI_NTP_RECENT_TABS_VIEWS_VIEWS_UTILS_H_

ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.mm

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#import "ios/chrome/browser/ui/ntp/recent_tabs/views/views_utils.h"
-
-#include "base/logging.h"
-#include "components/browser_sync/profile_sync_service.h"
-#include "components/sync/driver/sync_service.h"
-#include "components/sync_sessions/open_tabs_ui_delegate.h"
-#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
-#import "ios/chrome/browser/favicon/favicon_loader.h"
-#include "ios/chrome/browser/favicon/ios_chrome_favicon_loader_factory.h"
-#include "ios/chrome/browser/sync/profile_sync_service_factory.h"
-#import "ios/chrome/browser/ui/uikit_ui_util.h"
-#import "ios/chrome/common/favicon/favicon_attributes.h"
-#include "ios/chrome/grit/ios_theme_resources.h"
-#import "ios/third_party/material_components_ios/src/components/Typography/src/MaterialTypography.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-
-// Text color.
-const int kTextColorBlue = 0x4285f4;
-const int kTextColorGray = 0x333333;
-
-// Subtitle text color.
-const int kSubtitleColorBlue = 0x7daeff;
-const int kSubtitleColorGray = 0x969696;
-
-// Colors for the icons.
-const int kIconColorBlue = 0x4285f4;
-const int kIconColorGray = 0x5a5a5a;
-
-// Desired width and height of favicon.
-const CGFloat kfaviconWidthHeight = 24;
-// Minimum favicon pixel size to retrieve.
-const CGFloat kfaviconMinWidthHeight = 16;
-
-}  //  namespace
-
-namespace recent_tabs {
-
-UIImage* DefaultFaviconImage() {
-  return NativeImage(IDR_IOS_OMNIBOX_HTTP);
-}
-
-UILabel* CreateMultilineLabel(NSString* text) {
-  UILabel* label = [[UILabel alloc] initWithFrame:CGRectZero];
-  [label setTranslatesAutoresizingMaskIntoConstraints:NO];
-  [label setText:text];
-  [label setLineBreakMode:NSLineBreakByWordWrapping];
-  [label setNumberOfLines:0];
-  [label setFont:[MDCTypography body1Font]];
-  [label setTextColor:UIColorFromRGB(kTextColorGray)];
-  [label setTextAlignment:NSTextAlignmentNatural];
-  [label setBackgroundColor:[UIColor whiteColor]];
-  return label;
-}
-
-UIColor* GetTextColorBlue() {
-  return UIColorFromRGB(kTextColorBlue);
-}
-
-UIColor* GetTextColorGray() {
-  return UIColorFromRGB(kTextColorGray);
-}
-
-UIColor* GetSubtitleColorBlue() {
-  return UIColorFromRGB(kSubtitleColorBlue);
-}
-
-UIColor* GetSubtitleColorGray() {
-  return UIColorFromRGB(kSubtitleColorGray);
-}
-
-UIColor* GetIconColorBlue() {
-  return UIColorFromRGB(kIconColorBlue);
-}
-
-UIColor* GetIconColorGray() {
-  return UIColorFromRGB(kIconColorGray);
-}
-
-void GetFavicon(GURL const& url,
-                ios::ChromeBrowserState* browser_state,
-                FaviconGetterCompletionBlock block) {
-  DCHECK(browser_state);
-  syncer::SyncService* sync_service =
-      ProfileSyncServiceFactory::GetForBrowserState(browser_state);
-  sync_sessions::OpenTabsUIDelegate* open_tabs =
-      sync_service ? sync_service->GetOpenTabsUIDelegate() : NULL;
-  scoped_refptr<base::RefCountedMemory> favicon;
-  if (open_tabs &&
-      open_tabs->GetSyncedFaviconForPageURL(url.spec(), &favicon)) {
-    dispatch_queue_t queue =
-        dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0);
-    dispatch_async(queue, ^{
-      NSData* pngData =
-          [NSData dataWithBytes:favicon->front() length:favicon->size()];
-      UIImage* image = [[UIImage alloc] initWithData:pngData];
-      dispatch_async(dispatch_get_main_queue(), ^{
-        // |UIImage initWithData:| may return nil.
-        if (image) {
-          block([FaviconAttributes attributesWithImage:image]);
-        } else {
-          block([FaviconAttributes attributesWithImage:DefaultFaviconImage()]);
-        }
-      });
-    });
-    block([FaviconAttributes attributesWithImage:DefaultFaviconImage()]);
-    return;
-  }
-
-  // Use the FaviconCache if there is no synced favicon.
-  FaviconLoader* loader =
-      IOSChromeFaviconLoaderFactory::GetForBrowserState(browser_state);
-  if (loader) {
-    FaviconAttributes* attr =
-        loader->FaviconForUrl(url, kfaviconMinWidthHeight, kfaviconWidthHeight,
-                              /*fallback_to_google_server=*/false, block);
-    DCHECK(attr);
-    block(attr);
-    return;
-  }
-  // Finally returns a default image.
-  block([FaviconAttributes attributesWithImage:DefaultFaviconImage()]);
-}
-
-}  // namespace recent_tabs