Revert 198844 "Move sequenced_task_runner to base/task"

trunk/src/base/message_loop.h

 // 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.
 
 #ifndef BASE_MESSAGE_LOOP_H_
 #define BASE_MESSAGE_LOOP_H_
 
 #include <queue>
 #include <string>
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/location.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop_proxy.h"
 #include "base/message_pump.h"
 #include "base/observer_list.h"
 #include "base/pending_task.h"
+#include "base/sequenced_task_runner_helpers.h"
 #include "base/synchronization/lock.h"
-#include "base/task/sequenced_task_runner_helpers.h"
+#include "base/tracking_info.h"
 #include "base/time.h"
-#include "base/tracking_info.h"
 
 #if defined(OS_WIN)
 // We need this to declare base::MessagePumpWin::Dispatcher, which we should
 // really just eliminate.
 #include "base/message_pump_win.h"
 #elif defined(OS_IOS)
 #include "base/message_pump_io_ios.h"
 #elif defined(OS_POSIX)
 #include "base/message_pump_libevent.h"
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
@@ skipping 696 matching lines @@
 
 }  // namespace base
 
 // TODO(brettw) remove this when all users are updated to explicitly use the
 // namespace
 using base::MessageLoop;
 using base::MessageLoopForIO;
 using base::MessageLoopForUI;
 
 #endif  // BASE_MESSAGE_LOOP_H_