PlatformNotificationService layering cleanup.

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.
 {
   'variables': {
     'chrome_unit_tests_sources': [
       # histograms.xml is analyzed by AboutFlagsHistogramTest, so this
       # dependency is needed to make commit bots run unit_tests on
       # histograms.xml changes.
       '../tools/metrics/histograms/histograms.xml',
@@ skipping 1742 matching lines @@
         'browser/download/test_download_shelf.cc',
         'browser/download/test_download_shelf.h',
         'browser/media/fake_desktop_media_list.cc',
         'browser/media/fake_desktop_media_list.h',
         'browser/net/dns_probe_test_util.cc',
         'browser/net/dns_probe_test_util.h',
         'browser/net/url_request_mock_util.cc',
         'browser/net/url_request_mock_util.h',
         'browser/notifications/notification_test_util.cc',
         'browser/notifications/notification_test_util.h',
+        'browser/notifications/stub_notification_platform_bridge.cc',
+        'browser/notifications/stub_notification_platform_bridge.h',
         'browser/policy/test/local_policy_test_server.cc',
         'browser/policy/test/local_policy_test_server.h',
         'browser/profile_resetter/profile_resetter_test_base.cc',
         'browser/profile_resetter/profile_resetter_test_base.h',
         'browser/search_engines/template_url_service_factory_test_util.cc',
         'browser/search_engines/template_url_service_factory_test_util.h',
         'browser/search_engines/template_url_service_test_util.cc',
         'browser/search_engines/template_url_service_test_util.h',
         'browser/sessions/session_restore_test_helper.cc',
         'browser/sessions/session_restore_test_helper.h',
@@ skipping 1237 matching lines @@
               'dependencies': [
                 '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
               ],
             }],
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }