Run the later parts of startup as UI thread tasks

content/content_tests.gypi

 # Copyright (c) 2013 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': 'test_support_content',
       'type': 'static_library',
       'defines!': ['CONTENT_IMPLEMENTATION'],
@@ skipping 349 matching lines @@
         'browser/renderer_host/text_input_client_mac_unittest.mm',
         'browser/renderer_host/web_input_event_aura_unittest.cc',
         'browser/resolve_proxy_msg_helper_unittest.cc',
         'browser/site_instance_impl_unittest.cc',
         'browser/speech/chunked_byte_buffer_unittest.cc',
         'browser/speech/endpointer/endpointer_unittest.cc',
         'browser/speech/google_one_shot_remote_engine_unittest.cc',
         'browser/speech/google_streaming_remote_engine_unittest.cc',
         'browser/speech/speech_recognizer_impl_unittest.cc',
         'browser/ssl/ssl_host_state_unittest.cc',
+        'browser/startup_task_runner_unittest.cc',
         'browser/storage_partition_impl_unittest.cc',
         'browser/storage_partition_impl_map_unittest.cc',
         'browser/streams/stream_unittest.cc',
         'browser/streams/stream_url_request_job_unittest.cc',
         'browser/system_message_window_win_unittest.cc',
         'browser/tracing/trace_subscriber_stdio_unittest.cc',
         'browser/web_contents/aura/window_slider_unittest.cc',
         'browser/web_contents/navigation_controller_impl_unittest.cc',
         'browser/web_contents/navigation_entry_impl_unittest.cc',
         'browser/web_contents/render_view_host_manager_unittest.cc',
@@ skipping 1011 matching lines @@
                   'files': ['<(PRODUCT_DIR)/libnpapi_test_plugin.so'],
                 },
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }