Lazy initialization for PushMessagingEventRouter

chrome/chrome_browser_extensions.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.
 
 {
   'targets': [
     {
       'target_name': 'browser_extensions',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 260 matching lines @@
         'browser/extensions/api/proxy/proxy_api.cc',
         'browser/extensions/api/proxy/proxy_api.h',
         'browser/extensions/api/proxy/proxy_api_constants.cc',
         'browser/extensions/api/proxy/proxy_api_constants.h',
         'browser/extensions/api/proxy/proxy_api_helpers.cc',
         'browser/extensions/api/proxy/proxy_api_helpers.h',
         'browser/extensions/api/push_messaging/obfuscated_gaia_id_fetcher.cc',
         'browser/extensions/api/push_messaging/obfuscated_gaia_id_fetcher.h',
         'browser/extensions/api/push_messaging/push_messaging_api.cc',
         'browser/extensions/api/push_messaging/push_messaging_api.h',
+        'browser/extensions/api/push_messaging/push_messaging_api_factory.cc',
+        'browser/extensions/api/push_messaging/push_messaging_api_factory.h',
         'browser/extensions/api/push_messaging/push_messaging_invalidation_handler.cc',
         'browser/extensions/api/push_messaging/push_messaging_invalidation_handler.h',
         'browser/extensions/api/push_messaging/push_messaging_invalidation_handler_delegate.h',
         'browser/extensions/api/push_messaging/push_messaging_invalidation_mapper.h',
         'browser/extensions/api/record/record_api.cc',
         'browser/extensions/api/record/record_api.h',
         'browser/extensions/api/rtc_private/rtc_private_api.cc',
         'browser/extensions/api/rtc_private/rtc_private_api.h',
         'browser/extensions/api/runtime/runtime_api.cc',
         'browser/extensions/api/runtime/runtime_api.h',
@@ skipping 636 matching lines @@
           'msvs_settings': {
             'VCLinkerTool': {
               'SubSystem': '2',  # Set /SUBSYSTEM:WINDOWS
             },
           },
         },
       ],
     }, ],  # 'OS=="win"'
   ],  # 'conditions'
 }