[iOS] Add experimental new keyboard accessory view.

ios/chrome/browser/ui/toolbar/toolbar_tools_menu_button.h

 // 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.
 
 #ifndef IOS_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_TOOLS_MENU_BUTTON_H_
 #define IOS_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_TOOLS_MENU_BUTTON_H_
 
 #import <UIKit/UIKit.h>
 
-#import "ios/chrome/browser/ui/fancy_ui/tinted_button.h"
+#import "ios/chrome/browser/ui/fancy_ui/colored_button.h"
 #import "ios/chrome/browser/ui/toolbar/toolbar_controller.h"
 
-// TintedButton specialization that updates the tint color when the tools menu
+// ColoredButton specialization that updates the tint color when the tools menu
 // is visible or when the reading list associated with |readingListModel|
 // contains unread items.
 // Draws and animates the icon of the button using UIBezierPaths.
-@interface ToolbarToolsMenuButton : TintedButton
+@interface ToolbarToolsMenuButton : ColoredButton
 
 // Initializes and returns a newly allocated TintedButton with the specified
 // |frame| and the |style| of the toolbar it belongs to.
 - (instancetype)initWithFrame:(CGRect)frame
                         style:(ToolbarControllerStyle)style
     NS_DESIGNATED_INITIALIZER;
 
 - (instancetype)initWithFrame:(CGRect)frame NS_UNAVAILABLE;
 
 - (instancetype)initWithCoder:(NSCoder*)coder NS_UNAVAILABLE;
 
 // Informs the button that the Tools Menu's visibility is |toolsMenuVisible|.
 - (void)setToolsMenuIsVisible:(BOOL)toolsMenuVisible;
 
 // Notifies the button should alert user to the presence of reading list unseen
 // items.
 - (void)setReadingListContainsUnseenItems:(BOOL)readingListContainsUnseenItems;
 
 // Triggers an animation on the button to draw the user's attention to the
 // button.
 - (void)triggerAnimation;
 
 @end
 
 #endif  // IOS_CHROME_BROWSER_UI_TOOLBAR_TOOLBAR_TOOLS_MENU_BUTTON_H_