Re-implement form validation message UI with native widgets. (Common and Mac)

chrome/chrome_tests_unit.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': [
     {
       # This target contains mocks and test utilities that don't belong in
       # production libraries but are used by more than one test executable.
       'target_name': 'test_support_common',
       'type': 'static_library',
@@ skipping 1400 matching lines @@
         'browser/ui/cocoa/tabs/tab_view_unittest.mm',
         'browser/ui/cocoa/tabs/throbber_view_unittest.mm',
         'browser/ui/cocoa/tabs/throbbing_image_view_unittest.mm',
         'browser/ui/cocoa/task_manager_mac_unittest.mm',
         'browser/ui/cocoa/toolbar/reload_button_unittest.mm',
         'browser/ui/cocoa/toolbar/toolbar_button_unittest.mm',
         'browser/ui/cocoa/toolbar/toolbar_controller_unittest.mm',
         'browser/ui/cocoa/toolbar/toolbar_view_unittest.mm',
         'browser/ui/cocoa/toolbar/wrench_toolbar_button_cell_unittest.mm',
         'browser/ui/cocoa/vertical_gradient_view_unittest.mm',
+        'browser/ui/cocoa/validation_message_bubble_controller_unittest.mm',
         'browser/ui/cocoa/view_resizer_pong.h',
         'browser/ui/cocoa/view_resizer_pong.mm',
         'browser/ui/cocoa/website_settings_bubble_controller_unittest.mm',
         'browser/ui/cocoa/web_dialog_window_controller_unittest.mm',
         'browser/ui/cocoa/window_size_autosaver_unittest.mm',
         'browser/ui/cocoa/wrench_menu/menu_tracked_root_view_unittest.mm',
         'browser/ui/cocoa/wrench_menu/wrench_menu_button_cell_unittest.mm',
         'browser/ui/cocoa/wrench_menu/wrench_menu_controller_unittest.mm',
         'browser/ui/content_settings/content_setting_bubble_model_unittest.cc',
         'browser/ui/content_settings/content_setting_changed_infobar_delegate_unittest.cc',
@@ skipping 1042 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/unit_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }