FullscreenExitBubble temp UI for Mac.

chrome/chrome_dll.gypi

 # Copyright (c) 2011 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': [
         {
           'variables': {
             'conditions' : [
@@ skipping 227 matching lines @@
                 'app/nibs/DownloadItem.xib',
                 'app/nibs/DownloadShelf.xib',
                 'app/nibs/EditSearchEngine.xib',
                 'app/nibs/ExtensionInstalledBubble.xib',
                 'app/nibs/ExtensionInstallPrompt.xib',
                 'app/nibs/ExtensionInstallPromptInline.xib',
                 'app/nibs/ExtensionInstallPromptNoWarnings.xib',
                 'app/nibs/FindBar.xib',
                 'app/nibs/FirstRunBubble.xib',
                 'app/nibs/FirstRunDialog.xib',
+                '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/Panel.xib',
@@ skipping 373 matching lines @@
                   ],
                 }],
               ],  # conditions
             }],  # OS=="mac"
           ],  # conditions
         },  # target chrome_dll
       ],  # targets
     }],  # OS=="mac" or OS=="win"
   ],
 }