Update extension buttons to Material Design (Mac).

chrome/browser/ui/cocoa/extensions/browser_action_button.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_EXTENSIONS_BROWSER_ACTION_BUTTON_H_
 #define CHROME_BROWSER_UI_COCOA_EXTENSIONS_BROWSER_ACTION_BUTTON_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/scoped_nsobject.h"
 #include "base/memory/scoped_ptr.h"
 #import "chrome/browser/ui/cocoa/image_button_cell.h"
+#import "chrome/browser/ui/cocoa/toolbar/toolbar_button_cocoa.h"
 
 class Browser;
 @class BrowserActionsController;
 @class MenuController;
 class ToolbarActionViewController;
 class ToolbarActionViewDelegateBridge;
 
 // Fired on each drag event while the user is moving the button.
 extern NSString* const kBrowserActionButtonDraggingNotification;
 // Fired when the user drops the button.
 extern NSString* const kBrowserActionButtonDragEndNotification;
 
-@interface BrowserActionButton : NSButton<NSMenuDelegate> {
+@interface BrowserActionButton : ToolbarButton<NSMenuDelegate> {
  @private
   // Used to move the button and query whether a button is currently animating.
   base::scoped_nsobject<NSViewAnimation> moveAnimation_;
 
   // The controller that handles most non-view logic.
   ToolbarActionViewController* viewController_;
 
   // The bridge between the view controller and this object.
   scoped_ptr<ToolbarActionViewDelegateBridge> viewControllerDelegate_;
 
@@ skipping 66 matching lines @@
   // The controller for the browser actions bar that owns the button. Weak.
   BrowserActionsController* browserActionsController_;
 }
 
 @property(assign, nonatomic)
     BrowserActionsController* browserActionsController;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_EXTENSIONS_BROWSER_ACTION_BUTTON_H_