Implement confirm bubble for Mac.

chrome/chrome_tests.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.
 {
   'variables' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 1777 matching lines @@
         'browser/ui/cocoa/browser_window_controller_unittest.mm',
         'browser/ui/cocoa/bubble_view_unittest.mm',
         'browser/ui/cocoa/chrome_browser_window_unittest.mm',
         'browser/ui/cocoa/chrome_event_processing_window_unittest.mm',
         'browser/ui/cocoa/clickhold_button_cell_unittest.mm',
         'browser/ui/cocoa/cocoa_profile_test.h',
         'browser/ui/cocoa/cocoa_profile_test.mm',
         'browser/ui/cocoa/cocoa_test_helper.h',
         'browser/ui/cocoa/cocoa_test_helper.mm',
         'browser/ui/cocoa/command_observer_bridge_unittest.mm',
+        'browser/ui/cocoa/confirm_bubble_controller_unittest.mm',
         'browser/ui/cocoa/confirm_quit_panel_controller_unittest.mm',
         'browser/ui/cocoa/content_settings/collected_cookies_mac_unittest.mm',
         'browser/ui/cocoa/content_settings/cookie_details_unittest.mm',
         'browser/ui/cocoa/content_settings/cookie_details_view_controller_unittest.mm',
         'browser/ui/cocoa/download/download_item_button_unittest.mm',
         'browser/ui/cocoa/download/download_shelf_mac_unittest.mm',
         'browser/ui/cocoa/download/download_shelf_view_unittest.mm',
         'browser/ui/cocoa/download/download_util_mac_unittest.mm',
         'browser/ui/cocoa/draggable_button_unittest.mm',
         'browser/ui/cocoa/event_utils_unittest.mm',
@@ skipping 2727 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }