DO NOT REVIEW Plumb push messaging registration through to gcm.

content/content_browser.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.
 
 {
   'dependencies': [
     '../third_party/re2/re2.gyp:re2',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
@@ skipping 806 matching lines @@
     'browser/power_save_blocker_mac.cc',
     'browser/power_save_blocker_ozone.cc',
     'browser/power_save_blocker_win.cc',
     'browser/power_save_blocker_x11.cc',
     'browser/ppapi_plugin_process_host.cc',
     'browser/ppapi_plugin_process_host.h',
     'browser/profiler_controller_impl.cc',
     'browser/profiler_controller_impl.h',
     'browser/profiler_message_filter.cc',
     'browser/profiler_message_filter.h',
+    'browser/push_messaging_message_filter.cc',
+    'browser/push_messaging_message_filter.h',
     'browser/quota_dispatcher_host.cc',
     'browser/quota_dispatcher_host.h',
     'browser/renderer_data_memoizing_store.h',
     'browser/renderer_host/backing_store.cc',
     'browser/renderer_host/backing_store.h',
     'browser/renderer_host/backing_store_aura.cc',
     'browser/renderer_host/backing_store_aura.h',
     'browser/renderer_host/backing_store_gtk.cc',
     'browser/renderer_host/backing_store_gtk.h',
     'browser/renderer_host/backing_store_mac.h',
@@ skipping 846 matching lines @@
         '../build/linux/system.gyp:dbus',
         '../dbus/dbus.gyp:dbus',
       ],
     }, {  # OS != "linux" or use_dbus==0
       'sources!': [
         'browser/geolocation/wifi_data_provider_linux.cc',
       ],
     }],
   ],
 }