Move the notification constants to Blink

content/content_common.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': [
     '../base/base.gyp:base',
     '../cc/cc.gyp:cc',
     '../components/tracing.gyp:tracing',
     '../device/bluetooth/bluetooth.gyp:device_bluetooth',
@@ skipping 455 matching lines @@
       'common/mojo/service_registry_impl.cc',
       'common/mojo/service_registry_impl.h',
       'common/navigation_gesture.h',
       'common/navigation_params.cc',
       'common/navigation_params.h',
       'common/net/url_fetcher.cc',
       'common/net/url_request_service_worker_data.cc',
       'common/net/url_request_service_worker_data.h',
       'common/net/url_request_user_data.cc',
       'common/net/url_request_user_data.h',
-      'common/notification_constants.h',
       'common/one_writer_seqlock.cc',
       'common/one_writer_seqlock.h',
       'common/origin_trials/trial_token.cc',
       'common/origin_trials/trial_token.h',
       'common/origin_trials/trial_token_validator.cc',
       'common/origin_trials/trial_token_validator.h',
       'common/origin_util.cc',
       'common/p2p_messages.h',
       'common/page_state_serialization.cc',
       'common/page_state_serialization.h',
@@ skipping 503 matching lines @@
       'sources!': [
         'common/cursors/webcursor_ozone.cc',
         'common/font_list_ozone.cc',
         'common/gpu/gpu_memory_buffer_factory_ozone.cc',
         'common/gpu/gpu_memory_buffer_factory_ozone_native_pixmap.cc',
         'common/gpu/gpu_memory_buffer_factory_ozone_native_pixmap.h',
       ],
     }],
   ],
 }