[ios] Creates LocationBar button for Passwords Infobar badge.

- Creates a leadingButton that will hold the Infobar badge.
- Adds the password icon resources.
- Sets the leadingButton to display the passwords badge if
IsInfobarUIRebootEnabled.

Screenshot:
https://drive.google.com/open?id=1I4kFr7sk1LZXQfFsJNUuebmtAG3kf59q

Bug: 911864
Change-Id: Id9851f2beb48dd1ed476d80dc729e6ab30e26f97
Reviewed-on: https://chromium-review.googlesource.com/c/1487149Reviewed-by: Stepan Khapugin <stkhapugin@chromium.org>
Commit-Queue: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#636105}

ios/chrome/browser/ui/infobars/BUILD.gn

@@ -65,6 +65,7 @@ source_set("infobars_ui") {
   deps = [
     ":public",
     "resources:infobar_downloading",
+    "resources:infobar_passwords_icon",
     "resources:infobar_popup_blocker",
     "resources:infobar_warning",
     "//base",

ios/chrome/browser/ui/infobars/resources/BUILD.gn

@@ -30,3 +30,12 @@ imageset("infobar_popup_blocker") {
     "infobar_popup_blocker.imageset/infobar_popup_blocker@3x.png",
   ]
 }
+
+imageset("infobar_passwords_icon") {
+  sources = [
+    "infobar_passwords_icon.imageset/Contents.json",
+    "infobar_passwords_icon.imageset/infobar_passwords_icon.png",
+    "infobar_passwords_icon.imageset/infobar_passwords_icon@2x.png",
+    "infobar_passwords_icon.imageset/infobar_passwords_icon@3x.png",
+  ]
+}

ios/chrome/browser/ui/infobars/resources/infobar_passwords_icon.imageset/Contents.json

+{
+    "images": [
+        {
+            "idiom": "universal",
+            "scale": "1x",
+            "filename": "infobar_passwords_icon.png"
+        },
+        {
+            "idiom": "universal",
+            "scale": "2x",
+            "filename": "infobar_passwords_icon@2x.png"
+        },
+        {
+            "idiom": "universal",
+            "scale": "3x",
+            "filename": "infobar_passwords_icon@3x.png"
+        }
+    ],
+    "info": {
+        "version": 1,
+        "author": "xcode"
+    }
+}

ios/chrome/browser/ui/location_bar/BUILD.gn

@@ -48,6 +48,7 @@ source_set("location_bar") {
     "//ios/chrome/browser/ui/commands",
     "//ios/chrome/browser/ui/fullscreen",
     "//ios/chrome/browser/ui/fullscreen:ui",
+    "//ios/chrome/browser/ui/infobars:feature_flags",
     "//ios/chrome/browser/ui/ntp:util",
     "//ios/chrome/browser/ui/omnibox:omnibox",
     "//ios/chrome/browser/ui/omnibox:omnibox_internal",

ios/chrome/browser/ui/location_bar/location_bar_steady_view.h

@@ -41,6 +41,10 @@
 @property(nonatomic, strong) UIButton* locationButton;
 // The label displaying the current location URL.
 @property(nonatomic, strong) UILabel* locationLabel;
+// The button displayed in the leading corner of the view, i.e. infobar badge.
+// TODO(crbug.com/935804): This button is currently only being used in the
+// Infobar redesign.
+@property(nonatomic, strong) UIButton* leadingButton;
 // The button displayed in the trailing corner of the view, i.e. share button.
 @property(nonatomic, strong) UIButton* trailingButton;
 // The string that describes the current security level. Used for a11y.

ios/chrome/browser/ui/location_bar/location_bar_steady_view.mm

@@ -5,6 +5,7 @@
 #import "ios/chrome/browser/ui/location_bar/location_bar_steady_view.h"
 
 #include "components/strings/grit/components_strings.h"
+#import "ios/chrome/browser/ui/infobars/infobar_feature.h"
 #import "ios/chrome/browser/ui/location_bar/extended_touch_target_button.h"
 #import "ios/chrome/browser/ui/toolbar/public/toolbar_constants.h"
 #import "ios/chrome/browser/ui/util/uikit_ui_util.h"
@@ -245,6 +246,25 @@ const CGFloat kButtonTrailingSpacing = 10;
                          constant:-kButtonTrailingSpacing],
     ];
     [NSLayoutConstraint activateConstraints:_showButtonConstraints];
+
+    if (IsInfobarUIRebootEnabled()) {
+      // Setup leading button.
+      _leadingButton =
+          [ExtendedTouchTargetButton buttonWithType:UIButtonTypeSystem];
+      _leadingButton.translatesAutoresizingMaskIntoConstraints = NO;
+      [_locationButton addSubview:_leadingButton];
+
+      // Setup and activate the leading button constraints.
+      [NSLayoutConstraint activateConstraints:@[
+        [_leadingButton.widthAnchor constraintEqualToConstant:kButtonSize],
+        [_leadingButton.heightAnchor constraintEqualToConstant:kButtonSize],
+        [_leadingButton.leadingAnchor
+            constraintEqualToAnchor:self.leadingAnchor
+                           constant:kButtonTrailingSpacing],
+        [_leadingButton.centerYAnchor
+            constraintEqualToAnchor:self.centerYAnchor],
+      ]];
+    }
   }
 
   // Setup accessibility.

ios/chrome/browser/ui/location_bar/location_bar_view_controller.mm

@@ -15,6 +15,7 @@
 #import "ios/chrome/browser/ui/commands/browser_commands.h"
 #import "ios/chrome/browser/ui/commands/load_query_commands.h"
 #import "ios/chrome/browser/ui/fullscreen/fullscreen_animator.h"
+#import "ios/chrome/browser/ui/infobars/infobar_feature.h"
 #include "ios/chrome/browser/ui/location_bar/location_bar_steady_view.h"
 #import "ios/chrome/browser/ui/orchestrator/location_bar_offset_provider.h"
 #include "ios/chrome/browser/ui/ui_feature_flags.h"
@@ -173,6 +174,10 @@ typedef NS_ENUM(int, TrailingButtonState) {
   AddSameConstraints(self.locationBarSteadyView, self.view);
 
   [self switchToEditing:NO];
+
+  if (IsInfobarUIRebootEnabled()) {
+    [self updateInfobarButton];
+  }
 }
 
 - (void)traitCollectionDidChange:(UITraitCollection*)previousTraitCollection {
@@ -420,6 +425,17 @@ typedef NS_ENUM(int, TrailingButtonState) {
   base::RecordAction(base::UserMetricsAction("MobileToolbarShareMenu"));
 }
 
+// TODO(crbug.com/935804): This method is currently only being used in the
+// Infobar redesign.
+- (void)updateInfobarButton {
+  DCHECK(IsInfobarUIRebootEnabled());
+  [self.locationBarSteadyView.leadingButton
+      setImage:[[UIImage imageNamed:@"infobar_passwords_icon"]
+                   imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]
+      forState:UIControlStateNormal];
+  self.locationBarSteadyView.leadingButton.tintColor = [UIColor lightGrayColor];
+}
+
 #pragma mark - UIMenu
 
 - (void)showLongPressMenu:(UILongPressGestureRecognizer*)sender {