Mac: Animate the bookmark bar showing/hiding.

chrome/browser/cocoa/browser_window_cocoa.mm

 // Copyright (c) 2009 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.
 
 #include "base/gfx/rect.h"
 #include "base/logging.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/app/chrome_dll_resource.h"
 #include "chrome/browser/bookmarks/bookmark_utils.h"
 #include "chrome/browser/cocoa/browser_window_cocoa.h"
@@ skipping 405 matching lines @@
   return -1;
 }
 
 void BrowserWindowCocoa::Observe(NotificationType type,
                                  const NotificationSource& source,
                                  const NotificationDetails& details) {
   switch (type.value) {
     // Only the key window gets a direct toggle from the menu.
     // Other windows hear about it from the notification.
     case NotificationType::BOOKMARK_BAR_VISIBILITY_PREF_CHANGED:
-      [controller_ updateBookmarkBarVisibility];
+      [controller_ updateBookmarkBarVisibilityWithAnimation:YES];
       break;
     default:
       NOTREACHED();  // we don't ask for anything else!
       break;
   }
 }
 
 void BrowserWindowCocoa::DestroyBrowser() {
   [controller_ destroyBrowser];
 
   // at this point the controller is dead (autoreleased), so
   // make sure we don't try to reference it any more.
 }