[Sync] [Mac] Implement one-click signin bubble for OS X

chrome/chrome_dll.gypi

 # 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.
 {
   'conditions': [
     ['OS=="mac" or OS=="win"', {
       'targets': [
         {
           'target_name': 'chrome_dll',
           'type': 'none',
@@ skipping 255 matching lines @@
                 'app/nibs/FullscreenExitBubble.xib',
                 'app/nibs/GlobalErrorBubble.xib',
                 'app/nibs/HungRendererDialog.xib',
                 'app/nibs/HttpAuthLoginSheet.xib',
                 'app/nibs/ImportProgressDialog.xib',
                 'app/nibs/InfoBar.xib',
                 'app/nibs/InfoBarContainer.xib',
                 'app/nibs/InstantOptIn.xib',
                 'app/nibs/MainMenu.xib',
                 'app/nibs/Notification.xib',
+                'app/nibs/OneClickSigninBubble.xib',
                 'app/nibs/OneClickSigninDialog.xib',
                 'app/nibs/Panel.xib',
                 'app/nibs/PreviewableContents.xib',
                 'app/nibs/SaveAccessoryView.xib',
                 'app/nibs/SadTab.xib',
                 'app/nibs/SpeechRecognitionBubble.xib',
                 'app/nibs/TabView.xib',
                 'app/nibs/TaskManager.xib',
                 'app/nibs/Toolbar.xib',
                 'app/nibs/WrenchMenu.xib',
@@ skipping 251 matching lines @@
                   ],
                 }],
               ],  # conditions
             }],  # OS=="mac"
           ],  # conditions
         },  # target chrome_dll
       ],  # targets
     }],  # OS=="mac" or OS=="win"
   ],
 }