[iOS] Factor out the KeyboardAccessoryView.

ios/chrome/browser/ui/toolbar/web_toolbar_controller.mm

 // Copyright 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 "ios/chrome/browser/ui/toolbar/web_toolbar_controller.h"
 
 #import <CoreLocation/CoreLocation.h>
 #include <QuartzCore/QuartzCore.h>
 
 #include <stdint.h>
@@ skipping 28 matching lines @@
 #import "ios/chrome/browser/ui/commands/generic_chrome_command.h"
 #include "ios/chrome/browser/ui/commands/ios_command_ids.h"
 #import "ios/chrome/browser/ui/history/tab_history_popup_controller.h"
 #import "ios/chrome/browser/ui/image_util.h"
 #import "ios/chrome/browser/ui/keyboard/hardware_keyboard_watcher.h"
 #include "ios/chrome/browser/ui/omnibox/location_bar_controller_impl.h"
 #include "ios/chrome/browser/ui/omnibox/omnibox_view_ios.h"
 #import "ios/chrome/browser/ui/popup_menu/popup_menu_view.h"
 #import "ios/chrome/browser/ui/reversed_animation.h"
 #include "ios/chrome/browser/ui/rtl_geometry.h"
+#import "ios/chrome/browser/ui/toolbar/keyboard_accessory_view.h"
 #import "ios/chrome/browser/ui/toolbar/toolbar_controller+protected.h"
 #import "ios/chrome/browser/ui/toolbar/toolbar_controller.h"
 #import "ios/chrome/browser/ui/toolbar/toolbar_model_ios.h"
 #include "ios/chrome/browser/ui/toolbar/toolbar_resource_macros.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #import "ios/chrome/browser/ui/uikit_ui_util.h"
 #import "ios/chrome/browser/ui/url_loader.h"
 #import "ios/chrome/browser/ui/voice/text_to_speech_player.h"
 #import "ios/chrome/browser/ui/voice/voice_search_notification_names.h"
 #import "ios/chrome/common/material_timing.h"
@@ skipping 49 matching lines @@
 // displayed.
 const CGFloat kBackButtonTrailingPadding = 7.0;
 const CGFloat kForwardButtonTrailingPadding = -1.0;
 const CGFloat kReloadButtonTrailingPadding = 4.0;
 
 // Cancel button sizing.
 const CGFloat kCancelButtonBottomMargin = 4.0;
 const CGFloat kCancelButtonTopMargin = 4.0;
 const CGFloat kCancelButtonLeadingMargin = 7.0;
 const CGFloat kCancelButtonWidth = 40.0;
-const CGFloat kIpadButtonTitleFontSize = 20.0;
-const CGFloat kIphoneButtonTitleFontSize = 15.0;
 
 // Additional offset to adjust the y coordinate of the determinate progress bar
 // up by.
 const CGFloat kDeterminateProgressBarYOffset = 1.0;
 const CGFloat kMaterialProgressBarHeight = 2.0;
 const CGFloat kLoadCompleteHideProgressBarDelay = 0.5;
 // The default position animation is 10 pixels toward the trailing side, so
 // that's a negative leading offset.
 const LayoutOffset kPositionAnimationLeadingOffset = -10.0;
 
@@ skipping 85 matching lines @@
 
 CGRect RectShiftedDownAndResizedForStatusBar(CGRect rect) {
   if (IsIPadIdiom())
     return rect;
   rect.size.height -= StatusBarHeight();
   return RectShiftedDownForStatusBar(rect);
 }
 
 }  // namespace
 
-// View for the accessory view above the keyboard. Subclassed to allow playing
-// input clicks when pressed.
-@interface KeyboardAccessoryView : UIInputView<UIInputViewAudioFeedback>
-@end
-
-@implementation KeyboardAccessoryView
-
-- (BOOL)enableInputClicksWhenVisible {
-  return YES;
-}
-
-@end
-
 // TODO(crbug.com/619982) Remove this block and add CAAnimationDelegate when we
 // switch the main bots to Xcode 8.
 #if defined(__IPHONE_10_0) && (__IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0)
-@interface WebToolbarController ()<CAAnimationDelegate>
+@interface WebToolbarController ()<CAAnimationDelegate,
+                                   KeyboardAccessoryViewDelegate>
 @end
 #endif
 
 @interface WebToolbarController ()<LocationBarDelegate,
                                    OmniboxPopupPositioner,
                                    ToolbarFrameDelegate> {
   // Top-level view for web content.
   UIView* _webToolbar;
   UIButton* _backButton;
   UIButton* _forwardButton;
   UIButton* _reloadButton;
   UIButton* _stopButton;
   UIButton* _starButton;
   UIButton* _voiceSearchButton;
   OmniboxTextFieldIOS* _omniBox;
   UIButton* _cancelButton;
-  UIView* _keyBoardAccessoryView;
-  UIButton* _keyboardVoiceSearchButton;
+  KeyboardAccessoryView* _keyBoardAccessoryView;
   // Progress bar used to show what fraction of the page has loaded.
   MDCProgressView* _determinateProgressView;
   UIImageView* _omniboxBackground;
   BOOL _prerenderAnimating;
   UIImageView* _incognitoIcon;
   UIView* _clippingView;
 
   std::unique_ptr<LocationBarController> _locationBar;
   BOOL _initialLayoutComplete;
   // If |YES|, toolbar is incognito.
@@ skipping 67 matching lines @@
 // Received when a TTS player has received audio data.
 - (void)audioReadyForPlayback:(NSNotification*)notification;
 // Updates the TTS button depending on whether or not TTS is currently playing.
 - (void)updateIsTTSPlaying:(NSNotification*)notify;
 // Moves VoiceOver to the button used to perform a voice search.
 - (void)moveVoiceOverToVoiceSearchButton;
 // Fade in and out toolbar items as the frame moves off screen.
 - (void)updateToolbarAlphaForFrame:(CGRect)frame;
 // Navigate to |query| from omnibox.
 - (void)loadURLForQuery:(NSString*)query;
-- (UIView*)keyboardButtonWithTitle:(NSString*)title frame:(CGRect)frame;
 // Lazily instantiate the keyboard accessory view.
 - (UIView*)keyboardAccessoryView;
 - (void)preloadVoiceSearch:(id)sender;
 // Calculates the CGRect to use for the omnibox's frame. Also sets the frames
 // of some buttons and |_webToolbar|.
 - (CGRect)newOmniboxFrame;
 - (void)animateMaterialOmnibox;
 - (void)fadeInOmniboxTrailingView;
 - (void)fadeInOmniboxLeadingView;
 - (void)fadeOutOmniboxTrailingView;
 - (void)fadeOutOmniboxLeadingView;
 - (void)fadeInIncognitoIcon;
 - (void)fadeOutIncognitoIcon;
 // Fade in the visible navigation buttons.
 - (void)fadeInNavigationControls;
 // Fade out the visible navigation buttons.
 - (void)fadeOutNavigationControls;
 // When the collapse animation is complete, hide the Material background and
 // restore the omnibox's background image.
 - (void)animationDidStop:(CAAnimation*)anim finished:(BOOL)flag;
 - (void)updateSnapshotWithWidth:(CGFloat)width forced:(BOOL)force;
 // Insert 'com' without the period if cursor is directly after a period.
 - (NSString*)updateTextForDotCom:(NSString*)text;
-// Handle the user pressing a key in the keyboard accessory view.
-- (void)pressKey:(id)sender;
 @end
 
 @implementation WebToolbarController
 
 @synthesize delegate = _delegate;
 @synthesize urlLoader = _urlLoader;
 
 - (instancetype)initWithDelegate:(id<WebToolbarDelegate>)delegate
                        urlLoader:(id<UrlLoader>)urlLoader
                     browserState:(ios::ChromeBrowserState*)browserState
@@ skipping 502 matching lines @@
   if (IsIPadIdiom()) {
     // Update toolbar accessory views.
     BOOL isCompactTabletView = IsCompactTablet(self.view);
     [_voiceSearchButton setHidden:isCompactTabletView];
     [_starButton setHidden:isCompactTabletView];
     [_reloadButton setHidden:isCompactTabletView];
     [_stopButton setHidden:isCompactTabletView];
     [self updateToolbarState];
 
     // Update keyboard accessory views.
-    BOOL hidden = [_keyboardVoiceSearchButton isHidden];
+    auto mode = _keyBoardAccessoryView.mode;
     _keyBoardAccessoryView = nil;
     [_omniBox setInputAccessoryView:[self keyboardAccessoryView]];
-    [_keyboardVoiceSearchButton setHidden:hidden];
+    _keyBoardAccessoryView.mode = mode;
     if ([_omniBox isFirstResponder]) {
       [_omniBox reloadInputViews];
     }
 
     // Re-layout toolbar and omnibox.
     [_webToolbar setFrame:[self specificControlsArea]];
     [self layoutOmnibox];
   }
 }
 
@@ skipping 52 matching lines @@
   if (sender == _backButton) {
     base::RecordAction(UserMetricsAction("MobileToolbarBack"));
   } else if (sender == _forwardButton) {
     base::RecordAction(UserMetricsAction("MobileToolbarForward"));
   } else if (sender == _reloadButton) {
     base::RecordAction(UserMetricsAction("MobileToolbarReload"));
   } else if (sender == _stopButton) {
     base::RecordAction(UserMetricsAction("MobileToolbarStop"));
   } else if (sender == _voiceSearchButton) {
     base::RecordAction(UserMetricsAction("MobileToolbarVoiceSearch"));
-  } else if (sender == _keyboardVoiceSearchButton) {
-    base::RecordAction(UserMetricsAction("MobileCustomRowVoiceSearch"));
   } else if (sender == _starButton) {
     base::RecordAction(UserMetricsAction("MobileToolbarToggleBookmark"));
   } else {
     [super recordUserMetrics:sender];
   }
 }
 
 - (IBAction)stackButtonTouchDown:(id)sender {
   [self.delegate prepareToEnterTabSwitcher:self];
 }
@@ skipping 290 matching lines @@
           kLocationAuthorizationStatusCount);
     }
   }
   [self cancelOmniboxEdit];
 }
 
 - (void)locationBarHasBecomeFirstResponder {
   [self.delegate locationBarDidBecomeFirstResponder:self];
   [self animateMaterialOmnibox];
 
-  [_keyboardVoiceSearchButton setHidden:NO];
+  _keyBoardAccessoryView.mode = VOICE_SEARCH;
 
   // Record the appropriate user action for focusing the omnibox.
   web::WebState* webState = [self.delegate currentWebState];
   if (webState) {
     if (webState->GetVisibleURL() == GURL(kChromeUINewTabURL)) {
       OmniboxEditModel* model = _locationBar->GetLocationEntry()->model();
       if (model->is_caret_visible()) {
         base::RecordAction(
             base::UserMetricsAction("MobileFocusedOmniboxOnNtp"));
       } else {
@@ skipping 17 matching lines @@
 }
 
 - (void)locationBarChanged {
   // Hide the voice search button once the user starts editing the omnibox but
   // show it if the omnibox is empty.
   bool isEditingOrEmpty = _locationBar->GetLocationEntry()->IsEditingOrEmpty();
   BOOL editingAndNotEmpty = isEditingOrEmpty && _omniBox.text.length != 0;
   // If the voice search button is visible but about to be hidden (i.e.
   // the omnibox is no longer empty) then this is the first omnibox text so
   // record a user action.
-  if (![_keyboardVoiceSearchButton isHidden] && editingAndNotEmpty) {
+  if (_keyBoardAccessoryView.mode == VOICE_SEARCH && editingAndNotEmpty) {
     base::RecordAction(UserMetricsAction("MobileFirstTextInOmnibox"));
   }
-  [_keyboardVoiceSearchButton setHidden:editingAndNotEmpty];
+  if (editingAndNotEmpty) {
+    _keyBoardAccessoryView.mode = KEY_SHORTCUTS;
+  } else {
+    _keyBoardAccessoryView.mode = VOICE_SEARCH;
+  }
 }
 
 - (web::WebState*)getWebState {
   return [self.delegate currentWebState];
 }
 
 - (ToolbarModel*)toolbarModel {
   ToolbarModelIOS* toolbarModelIOS = [self.delegate toolbarModelIOS];
   return toolbarModelIOS ? toolbarModelIOS->GetToolbarModel() : nullptr;
 }
@@ skipping 131 matching lines @@
     [self focusOmnibox];
     [_omniBox insertTextWhileEditing:result];
     // Notify the accessibility system to start reading the new contents of the
     // Omnibox.
     UIAccessibilityPostNotification(UIAccessibilityScreenChangedNotification,
                                     _omniBox);
   }
 }
 
 #pragma mark -
+#pragma mark KeyboardAccessoryViewDelegate
+
+- (void)keyboardAccessoryVoiceSearchTouchDown {
+  if (ios::GetChromeBrowserProvider()
+          ->GetVoiceSearchProvider()
+          ->IsVoiceSearchEnabled()) {
+    [self preloadVoiceSearch:_keyBoardAccessoryView];
+  }
+}
+
+- (void)keyboardAccessoryVoiceSearchTouchUpInside {
+  if (ios::GetChromeBrowserProvider()
+          ->GetVoiceSearchProvider()
+          ->IsVoiceSearchEnabled()) {
+    base::RecordAction(UserMetricsAction("MobileCustomRowVoiceSearch"));
+    GenericChromeCommand* command =
+        [[GenericChromeCommand alloc] initWithTag:IDC_VOICE_SEARCH];
+    [_keyBoardAccessoryView chromeExecuteCommand:command];
+  } else {
+    _keyBoardAccessoryView.mode = KEY_SHORTCUTS;
+  }
+}
+
+- (void)keyPressed:(NSString*)title {
+  NSString* text = [self updateTextForDotCom:title];
+  [_omniBox insertTextWhileEditing:text];
+}
+
+#pragma mark -
 #pragma mark Private methods.
 
 - (UIButton*)cancelButton {
   if (_cancelButton)
     return _cancelButton;
   _cancelButton = [UIButton buttonWithType:UIButtonTypeCustom];
   NSString* collapseName = _incognito ? @"collapse_incognito" : @"collapse";
   [_cancelButton setImage:[UIImage imageNamed:collapseName]
                  forState:UIControlStateNormal];
   NSString* collapsePressedName =
@@ skipping 334 matching lines @@
     // URL.
     ui::PageTransition transition = ui::PageTransitionFromInt(
         ui::PAGE_TRANSITION_LINK | ui::PAGE_TRANSITION_FROM_ADDRESS_BAR);
     [self.urlLoader loadURL:GURL(searchURL)
                    referrer:web::Referrer()
                  transition:transition
           rendererInitiated:NO];
   }
 }
 
-- (UIView*)keyboardButtonWithTitle:(NSString*)title frame:(CGRect)frame {
-  UIButton* button = [UIButton buttonWithType:UIButtonTypeCustom];
-  UIFont* font = nil;
-  UIImage* backgroundImage = nil;
-  if (IsIPadIdiom()) {
-    font = GetUIFont(FONT_HELVETICA, false, kIpadButtonTitleFontSize);
-  } else {
-    font = GetUIFont(FONT_HELVETICA, true, kIphoneButtonTitleFontSize);
+- (UIView*)keyboardAccessoryView {
+  if (!_keyBoardAccessoryView) {
+    NSArray<NSString*>* buttonTitles =
+        [NSArray arrayWithObjects:@":", @".", @"-", @"/", kDotComTLD, nil];
+    _keyBoardAccessoryView =
+        [[KeyboardAccessoryView alloc] initWithButtons:buttonTitles
+                                              delegate:self];
+    [_keyBoardAccessoryView
+        setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
+    _hardwareKeyboardWatcher = [[HardwareKeyboardWatcher alloc]
+        initWithAccessoryView:_keyBoardAccessoryView];
   }
-  // TODO(leng): Consider moving these images to pak files as well.
-  backgroundImage = [UIImage imageNamed:@"keyboard_button"];
-
-  button.frame = frame;
-  [button setTitle:title forState:UIControlStateNormal];
-  [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
-  [button.titleLabel setFont:font];
-  [button setBackgroundImage:backgroundImage forState:UIControlStateNormal];
-  [button addTarget:self
-                action:@selector(pressKey:)
-      forControlEvents:UIControlEventTouchUpInside];
-  button.isAccessibilityElement = YES;
-  [button setAccessibilityLabel:title];
-
-  return button;
-}
-
-- (UIView*)keyboardAccessoryView {
-  const CGFloat kViewHeightTablet = 70.0;
-  const CGFloat kViewHeightPhone = 43.0;
-  const CGFloat kButtonInset = 5.0;
-  const CGFloat kButtonSizeXTablet = 61.0;
-  const CGFloat kButtonSizeXPhone = 46.0;
-  const CGFloat kButtonSizeYTablet = 62.0;
-  const CGFloat kButtonSizeYPhone = 35.0;
-  const CGFloat kBetweenButtonSpacing = 15.0;
-  const CGFloat kBetweenButtonSpacingPhone = 7.0;
-
-  if (_keyBoardAccessoryView)
-    return _keyBoardAccessoryView;
-
-  const BOOL isTablet = IsIPadIdiom() && !IsCompactTablet(self.view);
-
-  // TODO(pinkerton): purge this view when low memory.
-  CGFloat width = [[UIScreen mainScreen] bounds].size.width;
-  CGFloat height = isTablet ? kViewHeightTablet : kViewHeightPhone;
-  CGRect frame = CGRectMake(0.0, 0.0, width, height);
-
-  _keyBoardAccessoryView =
-      [[KeyboardAccessoryView alloc] initWithFrame:frame
-                                    inputViewStyle:UIInputViewStyleKeyboard];
-  [_keyBoardAccessoryView setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
-
-  NSArray* buttonTitles =
-      [NSArray arrayWithObjects:@":", @".", @"-", @"/", kDotComTLD, nil];
-
-  // Center buttons in available space by placing them within a parent view
-  // that auto-centers.
-  CGFloat betweenButtonSpacing =
-      isTablet ? kBetweenButtonSpacing : kBetweenButtonSpacingPhone;
-  const CGFloat buttonWidth = isTablet ? kButtonSizeXTablet : kButtonSizeXPhone;
-
-  CGFloat totalWidth = (buttonTitles.count * buttonWidth) +
-                       ((buttonTitles.count - 1) * betweenButtonSpacing);
-  CGFloat indent = floor((width - totalWidth) / 2.0);
-  if (indent < kButtonInset)
-    indent = kButtonInset;
-  CGRect parentViewRect = CGRectMake(indent, 0.0, totalWidth, height);
-  UIView* parentView = [[UIView alloc] initWithFrame:parentViewRect];
-  [parentView setAutoresizingMask:UIViewAutoresizingFlexibleLeftMargin |
-                                  UIViewAutoresizingFlexibleRightMargin];
-  [_keyBoardAccessoryView addSubview:parentView];
-
-  // Create the buttons, starting at the left edge of |parentView|.
-  CGRect currentFrame =
-      CGRectMake(0.0, kButtonInset, buttonWidth,
-                 isTablet ? kButtonSizeYTablet : kButtonSizeYPhone);
-
-  for (NSString* title in buttonTitles) {
-    UIView* button = [self keyboardButtonWithTitle:title frame:currentFrame];
-    [parentView addSubview:button];
-    currentFrame.origin.x = CGRectGetMaxX(currentFrame) + betweenButtonSpacing;
-  }
-
-  // Create the voice search button and add it to _keyBoardAccessoryView over
-  // the text buttons.
-  _keyboardVoiceSearchButton = [UIButton buttonWithType:UIButtonTypeCustom];
-  [_keyboardVoiceSearchButton
-      setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
-  [_keyboardVoiceSearchButton setTag:IDC_VOICE_SEARCH];
-  SetA11yLabelAndUiAutomationName(_keyboardVoiceSearchButton,
-                                  IDS_IOS_ACCNAME_VOICE_SEARCH,
-                                  @"Voice Search");
-  // TODO(leng): Consider moving these icons into a pak file.
-  UIImage* voiceRow = [UIImage imageNamed:@"custom_row_voice"];
-  UIImage* voiceRowPressed = [UIImage imageNamed:@"custom_row_voice_pressed"];
-  [_keyboardVoiceSearchButton setBackgroundImage:voiceRow
-                                        forState:UIControlStateNormal];
-  [_keyboardVoiceSearchButton setBackgroundImage:voiceRowPressed
-                                        forState:UIControlStateHighlighted];
-
-  UIImage* voiceIcon = [UIImage imageNamed:@"voice_icon_keyboard_accessory"];
-  [_keyboardVoiceSearchButton setAdjustsImageWhenHighlighted:NO];
-  [_keyboardVoiceSearchButton setImage:voiceIcon forState:UIControlStateNormal];
-  [_keyboardVoiceSearchButton setFrame:[_keyBoardAccessoryView bounds]];
-
-  // Only add the voice search actions if voice search is enabled.
-  if (ios::GetChromeBrowserProvider()
-          ->GetVoiceSearchProvider()
-          ->IsVoiceSearchEnabled()) {
-    [_keyboardVoiceSearchButton addTarget:self
-                                   action:@selector(recordUserMetrics:)
-                         forControlEvents:UIControlEventTouchUpInside];
-    [_keyboardVoiceSearchButton addTarget:_keyboardVoiceSearchButton
-                                   action:@selector(chromeExecuteCommand:)
-                         forControlEvents:UIControlEventTouchUpInside];
-    [_keyboardVoiceSearchButton addTarget:self
-                                   action:@selector(preloadVoiceSearch:)
-                         forControlEvents:UIControlEventTouchDown];
-  } else {
-    [_keyboardVoiceSearchButton addTarget:self
-                                   action:@selector(ignoreVoiceSearch:)
-                         forControlEvents:UIControlEventTouchUpInside];
-  }
-
-  [_keyBoardAccessoryView addSubview:_keyboardVoiceSearchButton];
-
-  // Reset the external keyboard watcher.
-  _hardwareKeyboardWatcher = [[HardwareKeyboardWatcher alloc]
-      initWithAccessoryView:_keyBoardAccessoryView];
-
   return _keyBoardAccessoryView;
 }
 
 - (void)preloadVoiceSearch:(id)sender {
   DCHECK(ios::GetChromeBrowserProvider()
              ->GetVoiceSearchProvider()
              ->IsVoiceSearchEnabled());
-  [sender removeTarget:self
-                action:@selector(preloadVoiceSearch:)
-      forControlEvents:UIControlEventTouchDown];
-
   // Use a GenericChromeCommand because |sender| already has a tag set for a
   // different command.
   GenericChromeCommand* command =
       [[GenericChromeCommand alloc] initWithTag:IDC_PRELOAD_VOICE_SEARCH];
   [sender chromeExecuteCommand:command];
 }
 
-// Called when the keyboard voice search button is tapped with voice search
-// disabled.  Hides the voice search button but takes no other action.
-- (void)ignoreVoiceSearch:(id)sender {
-  [_keyboardVoiceSearchButton setHidden:YES];
-}
-
 - (CGFloat)omniboxLeading {
   // Compute what the leading (x-origin) position for the omniboox should be
   // based on what other controls are active.
   InterfaceIdiom idiom = IsIPadIdiom() ? IPAD_IDIOM : IPHONE_IDIOM;
 
   CGFloat trailingPadding = 0.0;
 
   LayoutRect leadingControlLayout = LayoutRectForRectInBoundingRect(
       [_backButton frame], [_webToolbar bounds]);
   LayoutRect forwardButtonLayout =
@@ skipping 529 matching lines @@
   if ([text isEqualToString:kDotComTLD]) {
     UITextRange* textRange = [_omniBox selectedTextRange];
     NSInteger pos = [_omniBox offsetFromPosition:[_omniBox beginningOfDocument]
                                       toPosition:textRange.start];
     if (pos > 0 && [[_omniBox text] characterAtIndex:pos - 1] == '.')
       return [kDotComTLD substringFromIndex:1];
   }
   return text;
 }
 
-- (void)pressKey:(id)sender {
-  DCHECK([sender isKindOfClass:[UIButton class]]);
-  [[UIDevice currentDevice] playInputClick];
-  NSString* text = [self updateTextForDotCom:[sender currentTitle]];
-  [_omniBox insertTextWhileEditing:text];
-}
-
 @end
 
 @implementation WebToolbarController (Testing)
 
 - (BOOL)isForwardButtonEnabled {
   return [_forwardButton isEnabled];
 }
 
 - (BOOL)isBackButtonEnabled {
   return [_backButton isEnabled];
@@ skipping 21 matching lines @@
 
 - (BOOL)isPrerenderAnimationRunning {
   return _prerenderAnimating;
 }
 
 - (OmniboxTextFieldIOS*)omnibox {
   return _omniBox;
 }
 
 @end