Revert 198844 "Move sequenced_task_runner to base/task"

trunk/src/base/sequenced_task_runner.cc

 // 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.
 
 #include "base/sequenced_task_runner.h"
 
 #include "base/bind.h"
 
 namespace base {
 
@@ skipping 11 matching lines @@
 }
 
 bool SequencedTaskRunner::ReleaseSoonInternal(
     const tracked_objects::Location& from_here,
     void(*releaser)(const void*),
     const void* object) {
   return PostNonNestableTask(from_here, Bind(releaser, object));
 }
 
 }  // namespace base