Run the later parts of startup as UI thread tasks

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',
     '../components/tracing.gyp:tracing',
     '../media/media.gyp:media',
     '../net/net.gyp:net',
@@ skipping 72 matching lines @@
     'public/common/sandboxed_process_launcher_delegate.h',
     'public/common/security_style.h',
     'public/common/show_desktop_notification_params.cc',
     'public/common/show_desktop_notification_params.h',
     'public/common/speech_recognition_error.h',
     'public/common/speech_recognition_grammar.h',
     'public/common/speech_recognition_result.h',
     'public/common/speech_recognition_result.cc',
     'public/common/ssl_status.cc',
     'public/common/ssl_status.h',
+    'public/common/startup_task_runner.h',
     'public/common/stop_find_action.h',
     'public/common/three_d_api_types.h',
     'public/common/top_controls_state.h',
     'public/common/top_controls_state_list.h',
     'public/common/url_constants.cc',
     'public/common/url_constants.h',
     'public/common/url_fetcher.h',
     'public/common/url_utils.cc',
     'public/common/url_utils.h',
     'public/common/zygote_fork_delegate_linux.h',
@@ skipping 219 matching lines @@
     'common/set_process_title.h',
     'common/set_process_title_linux.cc',
     'common/set_process_title_linux.h',
     'common/socket_stream.h',
     'common/socket_stream_handle_data.cc',
     'common/socket_stream_handle_data.h',
     'common/socket_stream_messages.h',
     'common/speech_recognition_messages.h',
     'common/ssl_status_serialization.cc',
     'common/ssl_status_serialization.h',
+    'common/startup_task_runner.cc',
     'common/swapped_out_messages.cc',
     'common/swapped_out_messages.h',
     'common/text_input_client_messages.h',
     'common/url_schemes.cc',
     'common/url_schemes.h',
     'common/utility_messages.h',
     'common/view_messages.h',
     'common/view_message_enums.h',
     'common/webplugin_geometry.cc',
     'common/webplugin_geometry.h',
@@ skipping 219 matching lines @@
         '..\\third_party\\directxsdk\\files\\Redist\\<(input)',
         '<(output)',
         '<(PRODUCT_DIR)',
         ],
         'msvs_cygwin_shell': 1,
       },
      ]
     }],
   ],
 }