Revert 198844 "Move sequenced_task_runner to base/task"

trunk/src/webkit/fileapi/file_system_quota_client.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/file_system_quota_client.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/sequenced_task_runner.h"
 #include "base/single_thread_task_runner.h"
-#include "base/task/sequenced_task_runner.h"
 #include "base/task_runner_util.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/net_util.h"
 #include "webkit/fileapi/file_system_context.h"
 #include "webkit/fileapi/file_system_quota_util.h"
 #include "webkit/fileapi/file_system_task_runners.h"
 #include "webkit/fileapi/file_system_usage_cache.h"
 #include "webkit/fileapi/file_system_util.h"
 #include "webkit/fileapi/sandbox_mount_point_provider.h"
 
@@ skipping 168 matching lines @@
                  origin,
                  fs_type),
       callback);
 }
 
 base::SequencedTaskRunner* FileSystemQuotaClient::file_task_runner() const {
   return file_system_context_->task_runners()->file_task_runner();
 }
 
 }  // namespace fileapi