[Mac]Implement ViewID support.

chrome/browser/cocoa/bookmark_bar_controller.mm

Index: chrome/browser/cocoa/bookmark_bar_controller.mm
diff --git a/chrome/browser/cocoa/bookmark_bar_controller.mm b/chrome/browser/cocoa/bookmark_bar_controller.mm
index b918707983e76c47b567224eb6f593d54860c39f..88e4b21b313f47b27a3d6378978a4872fa9446f0 100644
--- a/chrome/browser/cocoa/bookmark_bar_controller.mm
+++ b/chrome/browser/cocoa/bookmark_bar_controller.mm
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// 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.
 
@@ -33,6 +33,7 @@
 #import "chrome/browser/cocoa/menu_button.h"
 #import "chrome/browser/cocoa/themed_window.h"
 #import "chrome/browser/cocoa/toolbar_controller.h"
+#import "chrome/browser/cocoa/view_id_util.h"
 #import "chrome/browser/cocoa/view_resizer.h"
 #include "chrome/browser/metrics/user_metrics.h"
 #include "chrome/browser/pref_service.h"
@@ -997,6 +998,7 @@ const NSTimeInterval kBookmarkBarAnimationDuration = 0.12;
   scoped_nsobject<BookmarkButton>
       button([[BookmarkButton alloc] initWithFrame:frame]);
   DCHECK(button.get());
+  [button setViewID:VIEW_ID_BOOKMARK_BAR_ELEMENT];
 
   // [NSButton setCell:] warns to NOT use setCell: other than in the
   // initializer of a control.  However, we are using a basic
@@ -1072,6 +1074,7 @@ const NSTimeInterval kBookmarkBarAnimationDuration = 0.12;
   BookmarkButton* button = [[BookmarkButton alloc] initWithFrame:frame];
   [button setDraggable:NO];
   otherBookmarksButton_.reset(button);
+  [button setViewID:VIEW_ID_OTHER_BOOKMARKS];
 
   // Make sure this button, like all other BookmarkButtons, lives
   // until the end of the current event loop.