[Reland] [Extensions] Make extension message bubble factory platform-abstract

chrome/chrome_tests.gypi

 # Copyright 2013 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': {
     'chrome_browser_extensions_test_support_sources': [
       # A list of sources which is shared between different browser tests.
       'browser/apps/app_browsertest_util.cc',
       'browser/apps/app_browsertest_util.h',
       'browser/extensions/browsertest_util.cc',
@@ skipping 586 matching lines @@
       'browser/ui/views/autofill/autofill_dialog_view_tester_views.h',
       'browser/ui/views/autofill/autofill_popup_base_view_browsertest.cc',
       'browser/ui/views/autofill/card_unmask_prompt_view_tester_views.cc',
       'browser/ui/views/autofill/card_unmask_prompt_view_tester_views.h',
       'browser/ui/views/autofill/password_generation_popup_view_tester_views.cc',
       'browser/ui/views/autofill/password_generation_popup_view_tester_views.h',
       'browser/ui/views/bookmarks/bookmark_bubble_sign_in_delegate_browsertest.cc',
       'browser/ui/views/collected_cookies_views_browsertest.cc',
       'browser/ui/views/extensions/bookmark_override_browsertest.cc',
       'browser/ui/views/extensions/extension_install_dialog_view_browsertest.cc',
+      'browser/ui/views/extensions/extension_message_bubble_view_browsertest.cc',
       'browser/ui/views/frame/browser_view_browsertest.cc',
       'browser/ui/views/location_bar/zoom_bubble_view_browsertest.cc',
       'browser/ui/views/profiles/avatar_menu_button_browsertest.cc',
       'browser/ui/views/profiles/profile_chooser_view_browsertest.cc',
       'browser/ui/views/toolbar/browser_actions_container_browsertest.cc',
       'browser/ui/views/toolbar/toolbar_view_browsertest.cc',
       'browser/ui/views/translate/translate_bubble_view_browsertest.cc',
       'browser/ui/views/web_dialog_view_browsertest.cc',
     ],
     'chrome_browser_tests_chromeos_sources': [
@@ skipping 2608 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }