Remove now-unused constrained window code.

BUG=895514, 845389

Change-Id: I7e44184c8a88b3e905fe26fd131a4900969c8f48
Reviewed-on: https://chromium-review.googlesource.com/c/1287326
Commit-Queue: Avi Drissman <avi@chromium.org>
Reviewed-by: Sidney San Martín <sdy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#602916}

chrome/browser/ui/BUILD.gn

@@ -1968,19 +1968,6 @@ jumbo_split_static_library("ui") {
       "cocoa/confirm_quit.h",
       "cocoa/confirm_quit_panel_controller.h",
       "cocoa/confirm_quit_panel_controller.mm",
-      "cocoa/constrained_window/constrained_window_control_utils.h",
-      "cocoa/constrained_window/constrained_window_control_utils.mm",
-      "cocoa/constrained_window/constrained_window_custom_sheet.h",
-      "cocoa/constrained_window/constrained_window_custom_sheet.mm",
-      "cocoa/constrained_window/constrained_window_mac.h",
-      "cocoa/constrained_window/constrained_window_mac.mm",
-      "cocoa/constrained_window/constrained_window_sheet.h",
-      "cocoa/constrained_window/constrained_window_sheet_controller.h",
-      "cocoa/constrained_window/constrained_window_sheet_controller.mm",
-      "cocoa/constrained_window/constrained_window_sheet_info.h",
-      "cocoa/constrained_window/constrained_window_sheet_info.mm",
-      "cocoa/constrained_window/constrained_window_web_dialog_sheet.h",
-      "cocoa/constrained_window/constrained_window_web_dialog_sheet.mm",
       "cocoa/dock_icon.h",
       "cocoa/dock_icon.mm",
       "cocoa/first_run_dialog.h",
@@ -2051,8 +2038,6 @@ jumbo_split_static_library("ui") {
       "cocoa/share_menu_controller.mm",
       "cocoa/simple_message_box_cocoa.h",
       "cocoa/simple_message_box_cocoa.mm",
-      "cocoa/single_web_contents_dialog_manager_cocoa.h",
-      "cocoa/single_web_contents_dialog_manager_cocoa.mm",
       "cocoa/status_icons/status_icon_mac.h",
       "cocoa/status_icons/status_icon_mac.mm",
       "cocoa/status_icons/status_tray_mac.h",
@@ -2075,8 +2060,6 @@ jumbo_split_static_library("ui") {
       "cocoa/touchbar/web_textfield_touch_bar_controller.mm",
       "cocoa/ui_localizer.h",
       "cocoa/ui_localizer.mm",
-      "cocoa/web_contents_modal_dialog_host_cocoa.h",
-      "cocoa/web_contents_modal_dialog_host_cocoa.mm",
       "cocoa/window_size_autosaver.h",
       "cocoa/window_size_autosaver.mm",
       "views/apps/chrome_app_window_client_views_mac.mm",

chrome/browser/ui/cocoa/constrained_window/constrained_window_control_utils.h

-// Copyright (c) 2012 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 CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_CONTROL_UTILS_H_
-#define CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_CONTROL_UTILS_H_
-
-#import <Cocoa/Cocoa.h>
-
-#include "ui/base/resource/resource_bundle.h"
-
-namespace constrained_window {
-
-// Creates a label control.
-NSTextField* CreateLabel();
-
-// Helper function to create constrained window label string with the given
-// font and alignment.
-NSAttributedString* GetAttributedLabelString(
-    NSString* string,
-    ui::ResourceBundle::FontStyle fontStyle,
-    NSTextAlignment alignment,
-    NSLineBreakMode lineBreakMode);
-
-// Create a new NSTextField and add it to the specified parent.
-NSTextField* AddTextField(NSView* parent,
-                          const base::string16& message,
-                          const ui::ResourceBundle::FontStyle& font_style);
-
-// Add the given button to the specified parent and customize it
-// according to the parameters.
-void AddButton(NSView* parent,
-               NSButton* button,
-               int title_id,
-               id target,
-               SEL action,
-               BOOL should_auto_size);
-
-// Determine the frame required to fit the content of a string.  Uses the
-// provided height and width as preferred dimensions, where a value of
-// 0.0 indicates no preference.
-NSRect ComputeFrame(NSAttributedString* text, CGFloat width, CGFloat height);
-
-}  // namespace constrained_window
-
-#endif  // CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_CONTROL_UTILS_H_

chrome/browser/ui/cocoa/constrained_window/constrained_window_control_utils.mm

-// Copyright (c) 2012 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 "chrome/browser/ui/cocoa/constrained_window/constrained_window_control_utils.h"
-
-#include "base/mac/scoped_nsobject.h"
-#include "base/strings/sys_string_conversions.h"
-#include "skia/ext/skia_utils_mac.h"
-#import "third_party/google_toolbox_for_mac/src/AppKit/GTMUILocalizerAndLayoutTweaker.h"
-#include "ui/base/l10n/l10n_util_mac.h"
-
-namespace constrained_window {
-
-NSTextField* CreateLabel() {
-  NSTextField* label =
-      [[[NSTextField alloc] initWithFrame:NSZeroRect] autorelease];
-  [label setEditable:NO];
-  [label setSelectable:NO];
-  [label setBezeled:NO];
-  [label setDrawsBackground:NO];
-  return label;
-}
-
-NSAttributedString* GetAttributedLabelString(
-    NSString* string,
-    ui::ResourceBundle::FontStyle fontStyle,
-    NSTextAlignment alignment,
-    NSLineBreakMode lineBreakMode) {
-  if (!string)
-    return nil;
-
-  const gfx::Font& font =
-      ui::ResourceBundle::GetSharedInstance().GetFont(fontStyle);
-  base::scoped_nsobject<NSMutableParagraphStyle> paragraphStyle(
-      [[NSMutableParagraphStyle alloc] init]);
-  [paragraphStyle setAlignment:alignment];
-  [paragraphStyle setLineBreakMode:lineBreakMode];
-
-  NSDictionary* attributes = @{
-      NSFontAttributeName:            font.GetNativeFont(),
-      NSParagraphStyleAttributeName:  paragraphStyle.get()
-  };
-  return [[[NSAttributedString alloc] initWithString:string
-                                          attributes:attributes] autorelease];
-}
-
-NSTextField* AddTextField(NSView* parent,
-                          const base::string16& message,
-                          const ui::ResourceBundle::FontStyle& font_style) {
-  NSTextField* textField = constrained_window::CreateLabel();
-  [textField
-      setAttributedStringValue:constrained_window::GetAttributedLabelString(
-                                   base::SysUTF16ToNSString(message),
-                                   font_style, NSNaturalTextAlignment,
-                                   NSLineBreakByWordWrapping)];
-  [parent addSubview:textField];
-  return textField;
-}
-
-void AddButton(NSView* parent,
-               NSButton* button,
-               int title_id,
-               id target,
-               SEL action,
-               BOOL should_auto_size) {
-  if (title_id)
-    [button setTitle:l10n_util::GetNSString(title_id)];
-  [button setTarget:target];
-  [button setAction:action];
-  [parent addSubview:button];
-  if (should_auto_size)
-    [GTMUILocalizerAndLayoutTweaker sizeToFitView:button];
-}
-
-NSRect ComputeFrame(NSAttributedString* text, CGFloat width, CGFloat height) {
-  NSRect frame =
-      [text boundingRectWithSize:NSMakeSize(width, height)
-                         options:NSStringDrawingUsesLineFragmentOrigin];
-
-  // boundingRectWithSize: is known to underestimate the width, so
-  // additional padding needs to be added.
-  static const CGFloat kTextViewPadding = 10;
-  frame.size.width += kTextViewPadding;
-  return frame;
-}
-
-}  // namespace constrained_window

chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.h

-// Copyright (c) 2012 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 CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_CUSTOM_SHEET_H_
-#define CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_CUSTOM_SHEET_H_
-
-#import <Cocoa/Cocoa.h>
-
-#import "base/mac/scoped_nsobject.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet.h"
-
-// Represents a custom sheet. The sheet's window is shown without using the
-// system |beginSheet:...| API.
-@interface CustomConstrainedWindowSheet : NSObject<ConstrainedWindowSheet> {
- @protected
-  base::scoped_nsobject<NSWindow> customWindow_;
-  BOOL useSimpleAnimations_;
-}
-
-- (id)initWithCustomWindow:(NSWindow*)customWindow;
-
-// Defaults to NO, unless hardware that has problems with the standard
-// animations is detected.
-// The standard animation uses private CGS APIs, which can crash the window
-// server. https://crbug.com/515627#c75
-- (void)setUseSimpleAnimations:(BOOL)simpleAnimations;
-
-@end
-
-#endif  // CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_CUSTOM_SHEET_H_

chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.mm

-// Copyright (c) 2012 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 "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.h"
-
-#import <IOKit/IOKitLib.h>
-
-#include "base/mac/mach_logging.h"
-#include "base/mac/scoped_ioobject.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.h"
-#import "ui/base/cocoa/constrained_window/constrained_window_animation.h"
-
-namespace {
-
-// Length of the animation in seconds.
-const NSTimeInterval kSheetAnimationDuration = 0.18;
-
-// If the machine has a DisplayLink device attached, the WindowServer has a
-// tendency to crash https://crbug.com/755516. To avoid this, probe the
-// IOKit registry for a DisplayLink service, and turn on useSimpleAnimations_
-// if one is found. The result of this is not cached, in case the hardware
-// is attached after the first ConstrainedWindow is shown.
-bool HasDisplayLinkDevice() {
-  // The |matching| reference is consumed by IOServiceGetMatchingServices().
-  CFDictionaryRef matching = IOServiceMatching("DisplayLinkFramebuffer");
-  base::mac::ScopedIOObject<io_iterator_t> it;
-  kern_return_t kr = IOServiceGetMatchingServices(
-      kIOMasterPortDefault, matching, it.InitializeInto());
-  if (kr != KERN_SUCCESS) {
-    MACH_LOG(ERROR, kr) << "IOServiceGetMatchingServices";
-    return false;
-  }
-
-  base::mac::ScopedIOObject<io_object_t> object(IOIteratorNext(it));
-  return object != IO_OBJECT_NULL;
-}
-
-}  // namespace
-
-@implementation CustomConstrainedWindowSheet
-
-- (id)initWithCustomWindow:(NSWindow*)customWindow {
-  if ((self = [super init])) {
-    customWindow_.reset([customWindow retain]);
-    useSimpleAnimations_ = HasDisplayLinkDevice();
-  }
-  return self;
-}
-
-- (void)setUseSimpleAnimations:(BOOL)simpleAnimations {
-  useSimpleAnimations_ = simpleAnimations;
-}
-
-- (void)showSheetForWindow:(NSWindow*)window {
-  base::scoped_nsobject<NSAnimation> animation;
-  if (useSimpleAnimations_) {
-    [customWindow_ setAlphaValue:0.0];
-  } else {
-    animation.reset(
-        [[ConstrainedWindowAnimationShow alloc] initWithWindow:customWindow_]);
-  }
-  [window addChildWindow:customWindow_
-                 ordered:NSWindowAbove];
-  [self unhideSheet];
-  [self updateSheetPosition];
-  [customWindow_ makeKeyAndOrderFront:nil];
-
-  if (useSimpleAnimations_) {
-    [NSAnimationContext beginGrouping];
-    [[NSAnimationContext currentContext] setDuration:kSheetAnimationDuration];
-    [[customWindow_ animator] setAlphaValue:1.0];
-    [NSAnimationContext endGrouping];
-  } else {
-    [animation startAnimation];
-  }
-}
-
-- (void)closeSheetWithAnimation:(BOOL)withAnimation {
-  if (withAnimation) {
-    base::scoped_nsobject<NSAnimation> animation;
-    if (useSimpleAnimations_) {
-      // Use a blocking animation, rather than -[NSWindow animator].
-      NSArray* animationArray = @[ @{
-        NSViewAnimationTargetKey : customWindow_,
-        NSViewAnimationEffectKey : NSViewAnimationFadeOutEffect,
-      } ];
-      animation.reset(
-          [[NSViewAnimation alloc] initWithViewAnimations:animationArray]);
-      [animation setDuration:kSheetAnimationDuration];
-      [animation setAnimationBlockingMode:NSAnimationBlocking];
-    } else {
-      animation.reset([[ConstrainedWindowAnimationHide alloc]
-          initWithWindow:customWindow_]);
-    }
-    [animation startAnimation];
-  }
-
-  [[customWindow_ parentWindow] removeChildWindow:customWindow_];
-  [customWindow_ close];
-}
-
-- (void)hideSheet {
-  // Hide the sheet window, and any of its direct child windows, by setting the
-  // alpha to 0. This technique is used instead of -orderOut: because that may
-  // cause a Spaces change or window ordering change.
-  [customWindow_ setAlphaValue:0.0];
-  for (NSWindow* window : [customWindow_ childWindows]) {
-    [window setAlphaValue:0.0];
-  }
-}
-
-- (void)unhideSheet {
-  [customWindow_ setAlphaValue:1.0];
-  for (NSWindow* window : [customWindow_ childWindows]) {
-    [window setAlphaValue:1.0];
-  }
-}
-
-- (void)pulseSheet {
-  base::scoped_nsobject<NSAnimation> animation(
-      [[ConstrainedWindowAnimationPulse alloc] initWithWindow:customWindow_]);
-  [animation startAnimation];
-}
-
-- (void)makeSheetKeyAndOrderFront {
-  [customWindow_ makeKeyAndOrderFront:nil];
-}
-
-- (void)updateSheetPosition {
-  ConstrainedWindowSheetController* controller =
-      [ConstrainedWindowSheetController controllerForSheet:self];
-  NSPoint origin = [controller originForSheet:self
-                               withWindowSize:[customWindow_ frame].size];
-  [customWindow_ setFrameOrigin:origin];
-}
-
-- (void)resizeWithNewSize:(NSSize)size {
-  // NOOP
-}
-
-- (NSWindow*)sheetWindow {
-  return customWindow_;
-}
-
-@end

chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h

-// Copyright (c) 2012 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 CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_MAC_H_
-#define CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_MAC_H_
-
-#import <Cocoa/Cocoa.h>
-
-#include "base/mac/scoped_nsobject.h"
-#include "components/web_modal/web_contents_modal_dialog_manager.h"
-
-namespace content {
-class WebContents;
-}
-class ConstrainedWindowMac;
-class SingleWebContentsDialogManagerCocoa;
-@protocol ConstrainedWindowSheet;
-
-// A delegate for a constrained window. The delegate is notified when the
-// window closes.
-class ConstrainedWindowMacDelegate {
- public:
-  virtual void OnConstrainedWindowClosed(ConstrainedWindowMac* window) = 0;
-};
-
-// Creates a ConstrainedWindowMac, shows the dialog, and returns it.
-std::unique_ptr<ConstrainedWindowMac> CreateAndShowWebModalDialogMac(
-    ConstrainedWindowMacDelegate* delegate,
-    content::WebContents* web_contents,
-    id<ConstrainedWindowSheet> sheet);
-
-// Creates a ConstrainedWindowMac and returns it.
-std::unique_ptr<ConstrainedWindowMac> CreateWebModalDialogMac(
-    ConstrainedWindowMacDelegate* delegate,
-    content::WebContents* web_contents,
-    id<ConstrainedWindowSheet> sheet);
-
-// Constrained window implementation for Mac.
-// Normally an instance of this class is owned by the delegate. The delegate
-// should delete the instance when the window is closed.
-class ConstrainedWindowMac {
- public:
-  ConstrainedWindowMac(ConstrainedWindowMacDelegate* delegate,
-                       content::WebContents* web_contents,
-                       id<ConstrainedWindowSheet> sheet);
-  ~ConstrainedWindowMac();
-
-  // Shows the constrained window.
-  void ShowWebContentsModalDialog();
-
-  // Closes the constrained window.
-  void CloseWebContentsModalDialog();
-
-  SingleWebContentsDialogManagerCocoa* manager() const { return manager_; }
-  void set_manager(SingleWebContentsDialogManagerCocoa* manager) {
-    manager_ = manager;
-  }
-  id<ConstrainedWindowSheet> sheet() const { return sheet_.get(); }
-
-  // Called by |manager_| when the dialog is closing.
-  void OnDialogClosing();
-
-  // Whether or not the dialog was shown. If the dialog is auto-resizable, it
-  // is hidden until its WebContents initially loads.
-  bool DialogWasShown();
-
- private:
-  // Gets the dialog manager for |web_contents_|.
-  web_modal::WebContentsModalDialogManager* GetDialogManager();
-
-  ConstrainedWindowMacDelegate* delegate_;  // weak, owns us.
-  SingleWebContentsDialogManagerCocoa* manager_;  // weak, owned by WCMDM.
-  content::WebContents* web_contents_;  // weak, owned by dialog initiator.
-  base::scoped_nsprotocol<id<ConstrainedWindowSheet>> sheet_;
-  std::unique_ptr<SingleWebContentsDialogManagerCocoa> native_manager_;
-};
-
-#endif  // CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_MAC_H_

chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.mm

-// Copyright (c) 2012 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 "chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h"
-
-#include <memory>
-#include <utility>
-
-#include "base/logging.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet.h"
-#import "chrome/browser/ui/cocoa/single_web_contents_dialog_manager_cocoa.h"
-#include "components/guest_view/browser/guest_view_base.h"
-#include "content/public/browser/browser_thread.h"
-
-using web_modal::WebContentsModalDialogManager;
-
-std::unique_ptr<ConstrainedWindowMac> CreateAndShowWebModalDialogMac(
-    ConstrainedWindowMacDelegate* delegate,
-    content::WebContents* web_contents,
-    id<ConstrainedWindowSheet> sheet) {
-  ConstrainedWindowMac* window =
-      new ConstrainedWindowMac(delegate, web_contents, sheet);
-  window->ShowWebContentsModalDialog();
-  return std::unique_ptr<ConstrainedWindowMac>(window);
-}
-
-std::unique_ptr<ConstrainedWindowMac> CreateWebModalDialogMac(
-    ConstrainedWindowMacDelegate* delegate,
-    content::WebContents* web_contents,
-    id<ConstrainedWindowSheet> sheet) {
-  return std::unique_ptr<ConstrainedWindowMac>(
-      new ConstrainedWindowMac(delegate, web_contents, sheet));
-}
-
-ConstrainedWindowMac::ConstrainedWindowMac(
-    ConstrainedWindowMacDelegate* delegate,
-    content::WebContents* web_contents,
-    id<ConstrainedWindowSheet> sheet)
-    : delegate_(delegate),
-      sheet_([sheet retain]) {
-  DCHECK(sheet);
-
-  // |web_contents| may be embedded within a chain of nested GuestViews. If it
-  // is, follow the chain of embedders to the outermost WebContents and use it.
-  web_contents_ =
-      guest_view::GuestViewBase::GetTopLevelWebContents(web_contents);
-
-  native_manager_.reset(
-      new SingleWebContentsDialogManagerCocoa(this, sheet_.get(),
-                                              GetDialogManager()));
-}
-
-ConstrainedWindowMac::~ConstrainedWindowMac() {
-  CHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
-  native_manager_.reset();
-  DCHECK(!manager_);
-}
-
-void ConstrainedWindowMac::ShowWebContentsModalDialog() {
-  std::unique_ptr<SingleWebContentsDialogManagerCocoa> dialog_manager;
-  dialog_manager = std::move(native_manager_);
-  GetDialogManager()->ShowDialogWithManager(
-      [sheet_.get() sheetWindow], std::move(dialog_manager));
-}
-
-void ConstrainedWindowMac::CloseWebContentsModalDialog() {
-  if (manager_)
-    manager_->Close();
-}
-
-void ConstrainedWindowMac::OnDialogClosing() {
-  if (delegate_)
-    delegate_->OnConstrainedWindowClosed(this);
-}
-
-bool ConstrainedWindowMac::DialogWasShown() {
-  // If the dialog was shown, |native_manager_| would have been released.
-  return !native_manager_;
-}
-
-WebContentsModalDialogManager* ConstrainedWindowMac::GetDialogManager() {
-  DCHECK(web_contents_);
-  WebContentsModalDialogManager* dialog_manager =
-      WebContentsModalDialogManager::FromWebContents(web_contents_);
-  // If WebContentsModalDialogManager::CreateForWebContents(web_contents_) was
-  // never called, then the manager will be null. E.g., for browser tabs,
-  // TabHelpers::AttachTabHelpers() calls CreateForWebContents(). It is invalid
-  // to show a dialog on some kinds of WebContents. Crash cleanly in that case.
-  CHECK(dialog_manager);
-  return dialog_manager;
-}

chrome/browser/ui/cocoa/constrained_window/constrained_window_mac_browsertest.mm

-// Copyright (c) 2012 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 "chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h"
-
-#include "chrome/browser/profiles/profile.h"
-#include "chrome/browser/ui/browser.h"
-#include "chrome/browser/ui/browser_tabstrip.h"
-#include "chrome/browser/ui/browser_window.h"
-#import "chrome/browser/ui/cocoa/browser_window_controller.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.h"
-#include "chrome/browser/ui/exclusive_access/fullscreen_controller.h"
-#include "chrome/browser/ui/exclusive_access/fullscreen_controller_test.h"
-#include "chrome/browser/ui/tabs/tab_strip_model.h"
-#include "chrome/test/base/in_process_browser_test.h"
-#include "content/public/browser/web_contents.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "url/gurl.h"
-
-using ::testing::NiceMock;
-
-namespace {
-
-class ConstrainedWindowDelegateMock : public ConstrainedWindowMacDelegate {
- public:
-  MOCK_METHOD1(OnConstrainedWindowClosed, void(ConstrainedWindowMac*));
-};
-
-}  // namespace
-
-class ConstrainedWindowMacTest : public InProcessBrowserTest {
- public:
-  ConstrainedWindowMacTest()
-      : InProcessBrowserTest(),
-        tab0_(NULL),
-        tab1_(NULL),
-        controller_(NULL),
-        tab_view0_(NULL),
-        tab_view1_(NULL) {
-    sheet_window_.reset([[NSWindow alloc]
-        initWithContentRect:NSMakeRect(0, 0, 30, 30)
-                  styleMask:NSTitledWindowMask
-                    backing:NSBackingStoreBuffered
-                      defer:NO]);
-    [sheet_window_ setReleasedWhenClosed:NO];
-    sheet_.reset([[CustomConstrainedWindowSheet alloc]
-        initWithCustomWindow:sheet_window_]);
-    [sheet_ hideSheet];
-  }
-
-  void SetUpOnMainThread() override {
-    AddTabAtIndex(1, GURL("about:blank"), ui::PAGE_TRANSITION_LINK);
-    tab0_ = browser()->tab_strip_model()->GetWebContentsAt(0);
-    tab1_ = browser()->tab_strip_model()->GetWebContentsAt(1);
-    EXPECT_EQ(tab1_, browser()->tab_strip_model()->GetActiveWebContents());
-
-    controller_ = [BrowserWindowController browserWindowControllerForWindow:
-        browser()->window()->GetNativeWindow()];
-    EXPECT_TRUE(controller_);
-    tab_view0_ = [[controller_ tabStripController] viewAtIndex:0];
-    EXPECT_TRUE(tab_view0_);
-    tab_view1_ = [[controller_ tabStripController] viewAtIndex:1];
-    EXPECT_TRUE(tab_view1_);
-  }
-
- protected:
-  base::scoped_nsobject<CustomConstrainedWindowSheet> sheet_;
-  base::scoped_nsobject<NSWindow> sheet_window_;
-  content::WebContents* tab0_;
-  content::WebContents* tab1_;
-  BrowserWindowController* controller_;
-  NSView* tab_view0_;
-  NSView* tab_view1_;
-};
-
-// Test that a sheet added to a inactive tab is not shown until the
-// tab is activated.
-IN_PROC_BROWSER_TEST_F(ConstrainedWindowMacTest, ShowInInactiveTab) {
-  // Show dialog in non active tab.
-  NiceMock<ConstrainedWindowDelegateMock> delegate;
-  std::unique_ptr<ConstrainedWindowMac> dialog =
-      CreateAndShowWebModalDialogMac(&delegate, tab0_, sheet_);
-  EXPECT_EQ(0.0, [sheet_window_ alphaValue]);
-
-  // Switch to inactive tab.
-  browser()->tab_strip_model()->ActivateTabAt(0, true);
-  EXPECT_EQ(1.0, [sheet_window_ alphaValue]);
-
-  dialog->CloseWebContentsModalDialog();
-}
-
-// If a tab has never been shown then the associated tab view for the web
-// content will not be created. Verify that adding a constrained window to such
-// a tab works correctly.
-IN_PROC_BROWSER_TEST_F(ConstrainedWindowMacTest, ShowInUninitializedTab) {
-  content::WebContents::CreateParams create_params(browser()->profile());
-  create_params.initially_hidden = true;
-  std::unique_ptr<content::WebContents> web_contents(
-      content::WebContents::Create(create_params));
-  chrome::AddWebContents(browser(), NULL, std::move(web_contents),
-                         WindowOpenDisposition::NEW_BACKGROUND_TAB, gfx::Rect(),
-                         false);
-  content::WebContents* tab2 =
-      browser()->tab_strip_model()->GetWebContentsAt(2);
-  ASSERT_TRUE(tab2);
-  EXPECT_FALSE([tab2->GetNativeView() superview]);
-
-  // Show dialog and verify that it's not visible yet.
-  NiceMock<ConstrainedWindowDelegateMock> delegate;
-  std::unique_ptr<ConstrainedWindowMac> dialog =
-      CreateAndShowWebModalDialogMac(&delegate, tab2, sheet_);
-  EXPECT_FALSE([sheet_window_ isVisible]);
-
-  // Activate the tab and verify that the constrained window is shown.
-  browser()->tab_strip_model()->ActivateTabAt(2, true);
-  EXPECT_TRUE([tab2->GetNativeView() superview]);
-  EXPECT_TRUE([sheet_window_ isVisible]);
-  EXPECT_EQ(1.0, [sheet_window_ alphaValue]);
-
-  dialog->CloseWebContentsModalDialog();
-}
-
-// Test that adding a sheet disables tab dragging.
-IN_PROC_BROWSER_TEST_F(ConstrainedWindowMacTest, TabDragging) {
-  NiceMock<ConstrainedWindowDelegateMock> delegate;
-  std::unique_ptr<ConstrainedWindowMac> dialog =
-      CreateAndShowWebModalDialogMac(&delegate, tab1_, sheet_);
-
-  // Verify that the dialog disables dragging.
-  EXPECT_TRUE([controller_ isTabDraggable:tab_view0_]);
-  EXPECT_FALSE([controller_ isTabDraggable:tab_view1_]);
-
-  dialog->CloseWebContentsModalDialog();
-}
-
-// Test that closing a browser window with a sheet works.
-IN_PROC_BROWSER_TEST_F(ConstrainedWindowMacTest, BrowserWindowClose) {
-  NiceMock<ConstrainedWindowDelegateMock> delegate;
-  std::unique_ptr<ConstrainedWindowMac> dialog(
-      CreateAndShowWebModalDialogMac(&delegate, tab1_, sheet_));
-  EXPECT_EQ(1.0, [sheet_window_ alphaValue]);
-
-  // Close the browser window.
-  base::scoped_nsobject<NSWindow> browser_window(
-      [browser()->window()->GetNativeWindow() retain]);
-  EXPECT_TRUE([browser_window isVisible]);
-  [browser()->window()->GetNativeWindow() performClose:nil];
-  EXPECT_FALSE([browser_window isVisible]);
-}
-
-// Test that closing a tab with a sheet works.
-IN_PROC_BROWSER_TEST_F(ConstrainedWindowMacTest, TabClose) {
-  NiceMock<ConstrainedWindowDelegateMock> delegate;
-  std::unique_ptr<ConstrainedWindowMac> dialog(
-      CreateAndShowWebModalDialogMac(&delegate, tab1_, sheet_));
-  EXPECT_EQ(1.0, [sheet_window_ alphaValue]);
-
-  // Close the tab.
-  TabStripModel* tab_strip = browser()->tab_strip_model();
-  EXPECT_EQ(2, tab_strip->count());
-  EXPECT_TRUE(tab_strip->CloseWebContentsAt(1,
-                                            TabStripModel::CLOSE_USER_GESTURE));
-  EXPECT_EQ(1, tab_strip->count());
-}
-
-// Test that the sheet is still visible after entering and exiting fullscreen.
-IN_PROC_BROWSER_TEST_F(ConstrainedWindowMacTest, BrowserWindowFullscreen) {
-  NiceMock<ConstrainedWindowDelegateMock> delegate;
-  std::unique_ptr<ConstrainedWindowMac> dialog(
-      CreateAndShowWebModalDialogMac(&delegate, tab1_, sheet_));
-  EXPECT_EQ(1.0, [sheet_window_ alphaValue]);
-
-  // Toggle fullscreen twice: one for entering and one for exiting.
-  // Check to see if the sheet is visible.
-  for (int i = 0; i < 2; i++) {
-    {
-      // NOTIFICATION_FULLSCREEN_CHANGED is sent asynchronously. Wait for the
-      // notification before testing the sheet's visibility.
-      std::unique_ptr<FullscreenNotificationObserver> waiter(
-          new FullscreenNotificationObserver());
-      browser()
-          ->exclusive_access_manager()
-          ->fullscreen_controller()
-          ->ToggleBrowserFullscreenMode();
-      waiter->Wait();
-    }
-    EXPECT_EQ(1.0, [sheet_window_ alphaValue]);
-  }
-
-  dialog->CloseWebContentsModalDialog();
-}

chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet.h

-// Copyright (c) 2012 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 CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_SHEET_H_
-#define CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_SHEET_H_
-
-#import <Cocoa/Cocoa.h>
-
-// Protocol for a sheet to be showing using |ConstrainedWindowSheetController|.
-@protocol ConstrainedWindowSheet<NSObject>
-
-- (void)showSheetForWindow:(NSWindow*)window;
-
-- (void)closeSheetWithAnimation:(BOOL)withAnimation;
-
-- (void)hideSheet;
-
-- (void)unhideSheet;
-
-- (void)pulseSheet;
-
-- (void)makeSheetKeyAndOrderFront;
-
-- (void)updateSheetPosition;
-
-- (void)resizeWithNewSize:(NSSize)size;
-
-@property(readonly, nonatomic) NSWindow* sheetWindow;
-
-@end
-
-#endif  // CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_SHEET_H_

chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.h

-// Copyright (c) 2012 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 CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_SHEET_CONTROLLER_H_
-#define CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_SHEET_CONTROLLER_H_
-
-#import <Cocoa/Cocoa.h>
-
-#include <memory>
-#include <vector>
-
-#include "base/mac/scoped_nsobject.h"
-
-namespace web_modal {
-class WebContentsModalDialogHost;
-}
-
-class WebContentsModalDialogHostCocoa;
-
-@protocol ConstrainedWindowSheet;
-
-// This class manages multiple tab modal sheets for a single parent window. Each
-// tab can have a single sheet and only the active tab's sheet will be visible.
-// A tab in this case is the |parentView| passed to |-showSheet:forParentView:|.
-@interface ConstrainedWindowSheetController : NSObject {
- @private
-  base::scoped_nsobject<NSMutableArray> sheets_;
-  base::scoped_nsobject<NSWindow> parentWindow_;
-  base::scoped_nsobject<NSView> activeView_;
-
-  // Flag to prevent the sheet from updating its position if it's hidden during
-  // fullscreen. Otherwise, we will get janky movements during the animation.
-  BOOL isSheetHiddenForFullscreen_;
-
-  // Class that bridges the cross-platform web_modal APIs to the Cocoa sheet
-  // controller.
-  std::unique_ptr<WebContentsModalDialogHostCocoa> dialogHost_;
-}
-
-@property(readonly, nonatomic)
-    web_modal::WebContentsModalDialogHost* dialogHost;
-@property(readonly, nonatomic) NSWindow* parentWindow;
-
-// Returns a sheet controller for |parentWindow|. If a sheet controller does not
-// exist yet then one will be created.
-+ (ConstrainedWindowSheetController*)
-    controllerForParentWindow:(NSWindow*)parentWindow;
-
-// Find a controller that's managing the given sheet. If no such controller
-// exists then nil is returned.
-+ (ConstrainedWindowSheetController*)
-    controllerForSheet:(id<ConstrainedWindowSheet>)sheet;
-
-// Find the sheet attached to the given overlay window.
-+ (id<ConstrainedWindowSheet>)sheetForOverlayWindow:(NSWindow*)overlayWindow;
-
-// Shows the given sheet over |parentView|.
-- (void)showSheet:(id<ConstrainedWindowSheet>)sheet
-    forParentView:(NSView*)parentView;
-
-// Hides |sheet| over the active view.
-- (void)hideSheet:(id<ConstrainedWindowSheet>)sheet;
-
-// Hides and unhides the sheet at the beginning and end of fullscreen
-// transition. |hideSheetForFullscreenTransition| gets called at the beginning
-// of the transition and |unhideSheetForFullscreenTransition| gets called at
-// the end.
-- (void)hideSheetForFullscreenTransition;
-- (void)unhideSheetForFullscreenTransition;
-
-// Calculates the position of the sheet for the given window size.
-- (NSPoint)originForSheet:(id<ConstrainedWindowSheet>)sheet
-           withWindowSize:(NSSize)size;
-
-// Closes the given sheet.
-- (void)closeSheet:(id<ConstrainedWindowSheet>)sheet;
-
-// Run a pulse animation for the given sheet. This does nothing if the sheet
-// is not visible.
-- (void)pulseSheet:(id<ConstrainedWindowSheet>)sheet;
-
-// Gets the number of sheets attached to the controller's window.
-- (int)sheetCount;
-
-// The size of the overlay window, which can be used to determine a preferred
-// maximum size for a dialog that should be contained within |parentView|.
-- (NSSize)overlayWindowSizeForParentView:(NSView*)parentView;
-
-@end
-
-#endif  // CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_SHEET_CONTROLLER_H_

chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_info.h

-// Copyright (c) 2012 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 CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_SHEET_INFO_H_
-#define CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_SHEET_INFO_H_
-
-#import <Cocoa/Cocoa.h>
-
-#include "base/mac/scoped_nsobject.h"
-
-@protocol ConstrainedWindowSheet;
-
-// Information about a single sheet managed by
-// ConstrainedWindowSheetController. Note, this is a private class not meant for
-// public use.
-@interface ConstrainedWindowSheetInfo : NSObject {
- @private
-  base::scoped_nsprotocol<id<ConstrainedWindowSheet>> sheet_;
-  base::scoped_nsobject<NSView> parentView_;
-  base::scoped_nsobject<NSWindow> overlayWindow_;
-  BOOL sheetDidShow_;
-}
-
-@property(nonatomic, readonly) id<ConstrainedWindowSheet> sheet;
-@property(nonatomic, readonly) NSView* parentView;
-@property(nonatomic, readonly) NSWindow* overlayWindow;
-@property(nonatomic, assign) BOOL sheetDidShow;
-
-// Initializes a info object with for the given |sheet| and associated
-// |parentView| and |overlayWindow|.
-- (id)initWithSheet:(id<ConstrainedWindowSheet>)sheet
-         parentView:(NSView*)parentView
-      overlayWindow:(NSWindow*)overlayWindow;
-
-// Hides the sheet and the associated overlay window. Hiding is done in such
-// a way as to not disturb the window cycle order.
-- (void)hideSheet;
-
-// Shows the sheet and the associated overlay window.
-- (void)showSheet;
-
-@end
-
-#endif  // CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_SHEET_INFO_H_

chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_info.mm

-// Copyright (c) 2012 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 "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_info.h"
-
-#include "base/mac/foundation_util.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet.h"
-#include "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.h"
-
-@implementation ConstrainedWindowSheetInfo
-
-@synthesize sheetDidShow = sheetDidShow_;
-
-- (id)initWithSheet:(id<ConstrainedWindowSheet>)sheet
-         parentView:(NSView*)parentView
-      overlayWindow:(NSWindow*)overlayWindow {
-  if ((self = [super init])) {
-    sheet_.reset([sheet retain]);
-    parentView_.reset([parentView retain]);
-    overlayWindow_.reset([overlayWindow retain]);
-  }
-  return self;
-}
-
-- (id<ConstrainedWindowSheet>)sheet {
-  return sheet_;
-}
-
-- (NSView*)parentView {
-  return parentView_;
-}
-
-- (NSWindow*)overlayWindow {
-  return overlayWindow_;
-}
-
-- (void)hideSheet {
-  [sheet_ hideSheet];
-
-  // Overlay window is already invisible so just stop accepting mouse events.
-  [overlayWindow_ setIgnoresMouseEvents:YES];
-
-  // Make sure the now invisible sheet doesn't keep keyboard focus
-  [[overlayWindow_ parentWindow] makeKeyWindow];
-}
-
-- (void)showSheet {
-  [overlayWindow_ setIgnoresMouseEvents:NO];
-  if (sheetDidShow_) {
-    [sheet_ unhideSheet];
-  } else {
-    [sheet_ showSheetForWindow:overlayWindow_];
-    sheetDidShow_ = YES;
-  }
-
-  // The call to -addChildWindow:ordered: below works around a macOS bug
-  // (rdar://35418050) in 10.12 through (at least) 10.13.1: If a window (A) has
-  // a child window (B), and B has a sheet (C), then adding another child
-  // window (D) to A causes the sheet (C) to move behind its parent (B).
-  //
-  // This happens when the client certificate selector appears and then, after
-  // a timeout, the status bubble appears to indicate that the page is still
-  // loading.
-  //
-  //       ╭────────────────────────────╮
-  //       │     Browser window (A)     │
-  //       │ ┌───┬───────────────────┬──┼─┐
-  //       │ │   │ Cert selector (C) │  │ │
-  //       │ │   ╰───────────────────╯  │ │
-  //     ╭ ├─┼─────╮ Overlay window (B) │ │
-  //     ├ ╰─┼─────┴────────────────────╯ │
-  //     │   └────────────────────────────┘
-  //     ╰ Status bubble (D)
-  //
-  // Explicitly adding the sheet as a child window seems to let it participate
-  // in the window ordering process that happens when the root window gains a
-  // child so that it stays in front of its parent as expected.
-
-  if (NSWindow* sheet = [overlayWindow_ attachedSheet])
-    [overlayWindow_ addChildWindow:sheet ordered:NSWindowAbove];
-
-  [sheet_ makeSheetKeyAndOrderFront];
-}
-
-@end

chrome/browser/ui/cocoa/constrained_window/constrained_window_web_dialog_sheet.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 CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_WEB_DIALOG_SHEET_H_
-#define CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_WEB_DIALOG_SHEET_H_
-
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.h"
-
-namespace ui {
-class WebDialogDelegate;
-}
-
-// Represents a custom sheet for web dialog.
-@interface WebDialogConstrainedWindowSheet : CustomConstrainedWindowSheet {
- @private
-  NSSize current_size_;
-  ui::WebDialogDelegate* web_dialog_delegate_;  // Weak.
-}
-
-- (id)initWithCustomWindow:(NSWindow*)customWindow
-         webDialogDelegate:(ui::WebDialogDelegate*)delegate;
-
-@end
-
-#endif  // CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_WEB_DIALOG_SHEET_H_

chrome/browser/ui/cocoa/constrained_window/constrained_window_web_dialog_sheet.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 "chrome/browser/ui/cocoa/constrained_window/constrained_window_web_dialog_sheet.h"
-
-#import "ui/base/cocoa/window_size_constants.h"
-#include "ui/gfx/geometry/size.h"
-#include "ui/web_dialogs/web_dialog_delegate.h"
-
-@implementation WebDialogConstrainedWindowSheet
-
-- (id)initWithCustomWindow:(NSWindow*)customWindow
-         webDialogDelegate:(ui::WebDialogDelegate*)delegate {
-  if (self = [super initWithCustomWindow:customWindow]) {
-    current_size_ = ui::kWindowSizeDeterminedLater.size;
-    web_dialog_delegate_ = delegate;
-  }
-
-  return self;
-}
-
-- (void)updateSheetPosition {
-  if (web_dialog_delegate_) {
-    gfx::Size size;
-    web_dialog_delegate_->GetDialogSize(&size);
-
-    // If the dialog has autoresizing enabled, |size| will be empty. Use the
-    // last known dialog size.
-    NSSize content_size = size.IsEmpty() ? current_size_ :
-        NSMakeSize(size.width(), size.height());
-    [customWindow_ setContentSize:content_size];
-  }
-  [super updateSheetPosition];
-}
-
-- (void)resizeWithNewSize:(NSSize)size {
-  DCHECK(size.height > 0 && size.width > 0);
-  current_size_ = size;
-  [customWindow_ setContentSize:current_size_];
-
-  // self's updateSheetPosition() sets |customWindow_|'s contentSize to a
-  // fixed dialog size. Here, we want to resize to |size| instead. Use
-  // super rather than self to bypass the setContentSize() call for the fixed
-  // size.
-  [super updateSheetPosition];
-}
-
-@end

chrome/browser/ui/cocoa/single_web_contents_dialog_manager_cocoa.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 CHROME_BROWSER_UI_COCOA_SINGLE_WEB_CONTENTS_DIALOG_MANAGER_COCOA_H_
-#define CHROME_BROWSER_UI_COCOA_SINGLE_WEB_CONTENTS_DIALOG_MANAGER_COCOA_H_
-
-#import "base/mac/scoped_nsobject.h"
-#include "base/macros.h"
-#include "components/web_modal/single_web_contents_dialog_manager.h"
-
-class ConstrainedWindowMac;
-@protocol ConstrainedWindowSheet;
-
-// Cocoa implementation of web_modal::SingleWebContentsDialogManager for showing
-// native Cocoa sheet dialogs (of various kinds).
-class SingleWebContentsDialogManagerCocoa
-    : public web_modal::SingleWebContentsDialogManager {
- public:
-  SingleWebContentsDialogManagerCocoa(
-      ConstrainedWindowMac* client,
-      id<ConstrainedWindowSheet> sheet,
-      web_modal::SingleWebContentsDialogManagerDelegate* delegate);
-  ~SingleWebContentsDialogManagerCocoa() override;
-
-  // SingleWebContentsDialogManager overrides.
-  void Show() override;
-  void Hide() override;
-  void Close() override;
-  void Focus() override;
-  void Pulse() override;
-  void HostChanged(web_modal::WebContentsModalDialogHost* new_host) override;
-  gfx::NativeWindow dialog() override;
-
- private:
-  // Weak. Legacy DialogManager-style delegate interface that Cocoa uses.
-  ConstrainedWindowMac* client_;
-  base::scoped_nsprotocol<id<ConstrainedWindowSheet>> sheet_;
-  // Weak. Owns this.
-  web_modal::SingleWebContentsDialogManagerDelegate* delegate_;
-  // Weak. Owned by parent window.
-  web_modal::WebContentsModalDialogHost* host_;
-
-  DISALLOW_COPY_AND_ASSIGN(SingleWebContentsDialogManagerCocoa);
-};
-
-#endif  // CHROME_BROWSER_UI_COCOA_SINGLE_WEB_CONTENTS_DIALOG_MANAGER_COCOA_H_

chrome/browser/ui/cocoa/single_web_contents_dialog_manager_cocoa.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 "chrome/browser/ui/cocoa/single_web_contents_dialog_manager_cocoa.h"
-
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_custom_sheet.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_mac.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.h"
-#include "components/web_modal/web_contents_modal_dialog_host.h"
-#include "components/web_modal/web_contents_modal_dialog_manager.h"
-#include "content/public/browser/web_contents.h"
-
-SingleWebContentsDialogManagerCocoa::SingleWebContentsDialogManagerCocoa(
-    ConstrainedWindowMac* client,
-    id<ConstrainedWindowSheet> sheet,
-    web_modal::SingleWebContentsDialogManagerDelegate* delegate)
-    : client_(client),
-      sheet_([sheet retain]),
-      delegate_(delegate),
-      host_(nullptr) {
-  DCHECK(client);
-  client->set_manager(this);
-}
-
-SingleWebContentsDialogManagerCocoa::~SingleWebContentsDialogManagerCocoa() {
-}
-
-void SingleWebContentsDialogManagerCocoa::Show() {
-  // If a dialog is initially shown on a hidden/background WebContents, the
-  // |delegate_| will defer the Show() until the WebContents is shown. If the
-  // defer happens during tab closure or tab dragging, a suspected data race or
-  // ObserverList ordering may result in |host_| being null here. If the tab is
-  // closing anyway, it doesn't matter. For tab dragging, avoid a crash, but the
-  // user may have to switch tabs again to see the dialog. See
-  // http://crbug.com/514826 for details.
-  if (!host_)
-    return;
-
-  NSView* parent_view = host_->GetHostView().GetNativeNSView();
-  // Note that simply [parent_view window] for an inactive tab is nil. However,
-  // the following should always be non-nil for all WebContents containers.
-  NSWindow* parent_window = delegate_->GetWebContents()
-                                ->GetTopLevelNativeWindow()
-                                .GetNativeNSWindow();
-
-  [[ConstrainedWindowSheetController controllerForParentWindow:parent_window]
-      showSheet:sheet_ forParentView:parent_view];
-}
-
-void SingleWebContentsDialogManagerCocoa::Hide() {
-  NSWindow* parent_window = delegate_->GetWebContents()
-                                ->GetTopLevelNativeWindow()
-                                .GetNativeNSWindow();
-  [[ConstrainedWindowSheetController controllerForParentWindow:parent_window]
-      hideSheet:sheet_];
-}
-
-void SingleWebContentsDialogManagerCocoa::Close() {
-  [[ConstrainedWindowSheetController controllerForSheet:sheet_]
-      closeSheet:sheet_];
-  client_->set_manager(nullptr);
-  bool dialog_was_open = client_->DialogWasShown();
-  client_->OnDialogClosing();      // |client_| might delete itself here.
-  if (dialog_was_open)
-    delegate_->WillClose(dialog());  // Deletes |this|.
-}
-
-void SingleWebContentsDialogManagerCocoa::Focus() {
-}
-
-void SingleWebContentsDialogManagerCocoa::Pulse() {
-  [[ConstrainedWindowSheetController controllerForSheet:sheet_]
-      pulseSheet:sheet_];
-}
-
-void SingleWebContentsDialogManagerCocoa::HostChanged(
-    web_modal::WebContentsModalDialogHost* new_host) {
-  // No need to observe the host. For Cocoa, the constrained window controller
-  // will reposition the dialog when necessary. The host can also never change.
-  // Tabs showing a dialog can not be dragged off a Cocoa browser window.
-  // However, closing a tab with a dialog open will set the host back to null.
-  DCHECK_NE(!!host_, !!new_host);
-  host_ = new_host;
-}
-
-gfx::NativeWindow SingleWebContentsDialogManagerCocoa::dialog() {
-  return [sheet_ sheetWindow];
-}

chrome/browser/ui/cocoa/web_contents_modal_dialog_host_cocoa.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 CHROME_BROWSER_UI_COCOA_WEB_CONTENTS_MODAL_DIALOG_HOST_COCOA_H_
-#define CHROME_BROWSER_UI_COCOA_WEB_CONTENTS_MODAL_DIALOG_HOST_COCOA_H_
-
-#include "base/macros.h"
-#include "components/web_modal/web_contents_modal_dialog_host.h"
-
-@class ConstrainedWindowSheetController;
-
-// In a Cocoa browser, the modal dialog host is a simple bridge to the
-// ConstrainedWindowSheetController to get the dialog size and parent window.
-class WebContentsModalDialogHostCocoa
-    : public web_modal::WebContentsModalDialogHost {
- public:
-  explicit WebContentsModalDialogHostCocoa(
-      ConstrainedWindowSheetController* sheet_controller);
-  ~WebContentsModalDialogHostCocoa() override;
-
-  // web_modal::ModalDialogHost:
-  gfx::NativeView GetHostView() const override;
-  gfx::Point GetDialogPosition(const gfx::Size& size) override;
-  bool ShouldActivateDialog() const override;
-  void AddObserver(web_modal::ModalDialogHostObserver* observer) override;
-  void RemoveObserver(web_modal::ModalDialogHostObserver* observer) override;
-
-  // web_modal::WebContentsModalDialogHost:
-  gfx::Size GetMaximumDialogSize() override;
-
- private:
-  ConstrainedWindowSheetController* sheet_controller_;  // Weak. Owns |this|.
-
-  DISALLOW_COPY_AND_ASSIGN(WebContentsModalDialogHostCocoa);
-};
-
-#endif  // CHROME_BROWSER_UI_COCOA_WEB_CONTENTS_MODAL_DIALOG_HOST_COCOA_H_

chrome/browser/ui/cocoa/web_contents_modal_dialog_host_cocoa.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.
-
-#include "chrome/browser/ui/cocoa/web_contents_modal_dialog_host_cocoa.h"
-
-#include "chrome/browser/ui/browser_finder.h"
-#include "chrome/browser/ui/tab_dialogs.h"
-#include "chrome/browser/ui/tabs/tab_strip_model.h"
-#import "chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.h"
-#include "ui/gfx/geometry/point.h"
-#include "ui/gfx/geometry/size.h"
-
-WebContentsModalDialogHostCocoa::WebContentsModalDialogHostCocoa(
-    ConstrainedWindowSheetController* sheet_controller)
-    : sheet_controller_(sheet_controller) {
-}
-
-WebContentsModalDialogHostCocoa::~WebContentsModalDialogHostCocoa() {
-  // Toolkit-Views calls OnHostDestroying on observers here, but the Cocoa host
-  // doesn't need to be observed.
-}
-
-gfx::NativeView WebContentsModalDialogHostCocoa::GetHostView() const {
-  // To avoid the constrained window controller having to know about the browser
-  // view layout, use the active tab in the parent window.
-  NSWindow* parent_window = [sheet_controller_ parentWindow];
-  Browser* browser = chrome::FindBrowserWithWindow(parent_window);
-  // This could be null for packaged app windows, but this dialog host is
-  // currently only used for browsers.
-  DCHECK(browser);
-  content::WebContents* web_contents =
-      browser->tab_strip_model()->GetActiveWebContents();
-  DCHECK(web_contents);
-  TabDialogs* tab_dialogs = TabDialogs::FromWebContents(web_contents);
-  DCHECK(tab_dialogs);
-
-  // Note this returns the WebContents' superview, so it doesn't really matter
-  // which WebContents inside the browser we actually chose above.
-  return tab_dialogs->GetDialogParentView();
-}
-
-gfx::Point WebContentsModalDialogHostCocoa::GetDialogPosition(
-    const gfx::Size& size) {
-  // Dialogs are always re-positioned by the constrained window sheet controller
-  // so nothing interesting to return yet.
-  return gfx::Point();
-}
-
-bool WebContentsModalDialogHostCocoa::ShouldActivateDialog() const {
-  return [[sheet_controller_ parentWindow] isMainWindow];
-}
-
-void WebContentsModalDialogHostCocoa::AddObserver(
-    web_modal::ModalDialogHostObserver* observer) {
-  NOTREACHED();
-}
-void WebContentsModalDialogHostCocoa::RemoveObserver(
-    web_modal::ModalDialogHostObserver* observer) {
-  NOTREACHED();
-}
-
-gfx::Size WebContentsModalDialogHostCocoa::GetMaximumDialogSize() {
-  // The dialog should try to fit within the overlay for the web contents.
-  // Note that, for things like print preview, this is just a suggested maximum.
-  return gfx::Size([sheet_controller_
-      overlayWindowSizeForParentView:GetHostView().GetNativeNSView()]);
-}

chrome/test/BUILD.gn

@@ -1964,7 +1964,6 @@ test("browser_tests") {
 
         # TODO(crbug/845389): Re-Enable the following, which were temporarily
         # omitted from the build, but are still in use.
-        # "../browser/ui/cocoa/constrained_window/constrained_window_mac_browsertest.mm",
         # "../browser/ui/cocoa/page_info/page_info_bubble_views_mac_browsertest.mm",
       ]
       sources -= [
@@ -4127,7 +4126,6 @@ test("unit_tests") {
       "../browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller_unittest.mm",
       "../browser/ui/cocoa/color_panel_cocoa_unittest.mm",
       "../browser/ui/cocoa/confirm_quit_panel_controller_unittest.mm",
-      "../browser/ui/cocoa/constrained_window/constrained_window_sheet_controller_unittest.mm",
       "../browser/ui/cocoa/find_pasteboard_unittest.mm",
       "../browser/ui/cocoa/first_run_dialog_controller_unittest.mm",
       "../browser/ui/cocoa/history_menu_bridge_unittest.mm",