Enable content embedders to specify mojo application task runner.

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 127 matching lines @@
       'public/common/manifest.cc',
       'public/common/manifest.h',
       'public/common/media_metadata.cc',
       'public/common/media_metadata.h',
       'public/common/media_stream_request.cc',
       'public/common/media_stream_request.h',
       'public/common/menu_item.cc',
       'public/common/menu_item.h',
       'public/common/message_port_types.cc',
       'public/common/message_port_types.h',
+      'public/common/mojo_application_info.cc',
+      'public/common/mojo_application_info.h',
       'public/common/mojo_channel_switches.cc',
       'public/common/mojo_channel_switches.h',
       'public/common/mojo_shell_connection.h',
       'public/common/notification_resources.cc',
       'public/common/notification_resources.h',
       'public/common/origin_util.h',
       'public/common/page_state.cc',
       'public/common/page_state.h',
       'public/common/page_type.h',
       'public/common/page_zoom.h',
@@ skipping 508 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',
       ],
     }],
   ],
 }