[Mac]Implement ViewID support.

chrome/browser/cocoa/toolbar_controller.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_TOOLBAR_CONTROLLER_H_
 #define CHROME_BROWSER_COCOA_TOOLBAR_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/scoped_ptr.h"
 #include "base/scoped_nsobject.h"
+#import "chrome/browser/cocoa/button_with_viewid.h"
 #import "chrome/browser/cocoa/command_observer_bridge.h"
 #import "chrome/browser/cocoa/delayedmenu_button.h"
 #import "chrome/browser/cocoa/url_drop_target.h"
 #import "chrome/browser/cocoa/view_resizer.h"
 #include "chrome/browser/pref_member.h"
 
 @class AutocompleteTextField;
 @class AutocompleteTextFieldEditor;
 @class BrowserActionsContainerView;
 @class BackForwardMenuController;
@@ skipping 22 matching lines @@
 
 @interface ToolbarController : NSViewController<CommandObserverProtocol,
                                                 URLDropTargetController> {
  @protected
   // The ordering is important for unit tests. If new items are added or the
   // ordering is changed, make sure to update |-toolbarViews| and the
   // corresponding enum in the unit tests.
   IBOutlet DelayedMenuButton* backButton_;
   IBOutlet DelayedMenuButton* forwardButton_;
   IBOutlet ReloadButton* reloadButton_;
-  IBOutlet NSButton* homeButton_;
+  IBOutlet ButtonWithViewID* homeButton_;
   IBOutlet MenuButton* wrenchButton_;
   IBOutlet AutocompleteTextField* locationBar_;
   IBOutlet BrowserActionsContainerView* browserActionsContainerView_;
 
  @private
   ToolbarModel* toolbarModel_;  // weak, one per window
   CommandUpdater* commands_;  // weak, one per window
   Profile* profile_;  // weak, one per window
   Browser* browser_;  // weak, one per window
   scoped_ptr<CommandObserverBridge> commandObserver_;
@@ skipping 111 matching lines @@
 @interface ToolbarController(PrivateTestMethods)
 // Returns an array of views in the order of the outlets above.
 - (NSArray*)toolbarViews;
 - (void)showOptionalHomeButton;
 - (void)installWrenchMenu;
 // Return a hover button for the current event.
 - (NSButton*)hoverButtonForEvent:(NSEvent*)theEvent;
 @end
 
 #endif  // CHROME_BROWSER_COCOA_TOOLBAR_CONTROLLER_H_