[Mac]Implement ViewID support.

chrome/browser/cocoa/reload_button.h

 // Copyright (c) 2010 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_COCOA_RELOAD_BUTTON_H_
 #define CHROME_BROWSER_COCOA_RELOAD_BUTTON_H_
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/scoped_nsobject.h"
+#import "chrome/browser/cocoa/button_with_viewid.h"
 
 // NSButton subclass which defers certain state changes when the mouse
 // is hovering over it.
 
-@interface ReloadButton : NSButton {
+@interface ReloadButton : ButtonWithViewID {
  @private
   // Tracks whether the mouse is hovering for purposes of not making
   // unexpected state changes.
   BOOL isMouseInside_;
   scoped_nsobject<NSTrackingArea> trackingArea_;
 
   // Set when reload mode is requested, but not forced, and the mouse
   // is hovering.
   BOOL pendingReloadMode_;
 }
 
 // Returns YES if the mouse is currently inside the bounds.
 - (BOOL)isMouseInside;
 
 // Update the button to be a reload button or stop button depending on
 // |isLoading|.  If |force|, always sets the indicated mode.  If
 // |!force|, and the mouse is over the button, defer the transition
 // from stop button to reload button until the mouse has left the
 // button.  This prevents an inadvertent click _just_ as the state
 // changes.
 - (void)setIsLoading:(BOOL)isLoading force:(BOOL)force;
 
 @end
 
 @interface ReloadButton (PrivateTestingMethods)
 - (NSTrackingArea*)trackingArea;
 @end
 
 #endif  // CHROME_BROWSER_COCOA_RELOAD_BUTTON_H_