Revert 198844 "Move sequenced_task_runner to base/task"

trunk/src/webkit/fileapi/syncable/local_file_change_tracker.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 "webkit/fileapi/syncable/local_file_change_tracker.h"
 
 #include <queue>
 
 #include "base/location.h"
 #include "base/logging.h"
+#include "base/sequenced_task_runner.h"
 #include "base/stl_util.h"
-#include "base/task/sequenced_task_runner.h"
 #include "third_party/leveldatabase/src/include/leveldb/db.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_file_util.h"
 #include "webkit/fileapi/file_system_operation_context.h"
 #include "webkit/fileapi/file_system_util.h"
 #include "webkit/fileapi/syncable/local_file_sync_status.h"
 #include "webkit/fileapi/syncable/syncable_file_system_util.h"
 
 using fileapi::FileSystemContext;
 using fileapi::FileSystemFileUtil;
@@ skipping 394 matching lines @@
       db_.reset();
       return db_status_;
     }
     dirty_files->push(url);
     iter->Next();
   }
   return SYNC_STATUS_OK;
 }
 
 }  // namespace sync_file_system