[rAC, OSX] Use bubble windows for error messages.

chrome/chrome_browser_ui.gypi

 # Copyright 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.
 
 {
   'targets': [
     {
       'target_name': 'browser_ui',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 481 matching lines @@
         'browser/ui/cocoa/apps/chrome_shell_window_delegate_cocoa.mm',
         'browser/ui/cocoa/apps/native_app_window_cocoa.h',
         'browser/ui/cocoa/apps/native_app_window_cocoa.mm',
         'browser/ui/cocoa/autofill/autofill_account_chooser.h',
         'browser/ui/cocoa/autofill/autofill_account_chooser.mm',
         'browser/ui/cocoa/autofill/autofill_details_container.h',
         'browser/ui/cocoa/autofill/autofill_details_container.mm',
         'browser/ui/cocoa/autofill/autofill_dialog_cocoa.h',
         'browser/ui/cocoa/autofill/autofill_dialog_cocoa.mm',
         'browser/ui/cocoa/autofill/autofill_dialog_constants.h',
+        'browser/ui/cocoa/autofill/autofill_error_bubble_controller.h',
+        'browser/ui/cocoa/autofill/autofill_error_bubble_controller.mm',
         'browser/ui/cocoa/autofill/autofill_layout.h',
         'browser/ui/cocoa/autofill/autofill_notification_container.h',
         'browser/ui/cocoa/autofill/autofill_notification_container.mm',
         'browser/ui/cocoa/autofill/autofill_notification_controller.h',
         'browser/ui/cocoa/autofill/autofill_notification_controller.mm',
         'browser/ui/cocoa/autofill/autofill_main_container.h',
         'browser/ui/cocoa/autofill/autofill_main_container.mm',
         'browser/ui/cocoa/autofill/autofill_overlay_controller.h',
         'browser/ui/cocoa/autofill/autofill_overlay_controller.mm',
         'browser/ui/cocoa/autofill/autofill_popup_view_bridge.h',
@@ skipping 2787 matching lines @@
             'browser/ui/webui/local_discovery/local_discovery_ui.cc',
             'browser/ui/webui/local_discovery/local_discovery_ui.h',
             'browser/ui/webui/local_discovery/local_discovery_ui_handler.cc',
             'browser/ui/webui/local_discovery/local_discovery_ui_handler.h',
           ],
         }],
       ],
     },
   ],
 }