base: Make it possible to replace the MessageLoop's task runner

base/base.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.
 
 {
   'includes': [
     'trace_event/trace_event.gypi',
   ],
   'target_defaults': {
     'variables': {
@@ skipping 350 matching lines @@
           'memory/shared_memory_handle.h',
           'memory/shared_memory_handle_mac.cc',
           'memory/shared_memory_mac.cc',
           'memory/shared_memory_nacl.cc',
           'memory/shared_memory_posix.cc',
           'memory/shared_memory_win.cc',
           'memory/singleton.cc',
           'memory/singleton.h',
           'memory/weak_ptr.cc',
           'memory/weak_ptr.h',
+          'message_loop/bindable_single_thread_task_runner.h',
           'message_loop/incoming_task_queue.cc',
           'message_loop/incoming_task_queue.h',
           'message_loop/message_loop.cc',
           'message_loop/message_loop.h',
           'message_loop/message_loop_task_runner.cc',
           'message_loop/message_loop_task_runner.h',
           'message_loop/message_pump.cc',
           'message_loop/message_pump.h',
           'message_loop/message_pump_android.cc',
           'message_loop/message_pump_android.h',
@@ skipping 654 matching lines @@
           'i18n/time_formatting.h',
           'i18n/timezone.cc',
           'i18n/timezone.h',
           'i18n/utf8_validator_tables.cc',
           'i18n/utf8_validator_tables.h',
         ],
       }]
     ],
   },
 }