Revert 198844 "Move sequenced_task_runner to base/task"

trunk/src/chrome/browser/chromeos/drive/drive_file_stream_reader.cc

 // Copyright 2013 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 "chrome/browser/chromeos/drive/drive_file_stream_reader.h"
 
 #include <algorithm>
 #include <cstring>
 
 #include "base/callback_helpers.h"
 #include "base/logging.h"
-#include "base/task/sequenced_task_runner.h"
+#include "base/sequenced_task_runner.h"
 #include "chrome/browser/chromeos/drive/drive.pb.h"
 #include "chrome/browser/chromeos/drive/file_reader.h"
 #include "chrome/browser/chromeos/drive/file_system_interface.h"
 #include "chrome/browser/google_apis/task_util.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 
 using content::BrowserThread;
 
@@ skipping 407 matching lines @@
     // Note: due to the same reason, LocalReaderProxy::OnCompleted may
     // or may not be called. This is timing issue, and it is difficult to avoid
     // unfortunately.
     if (error != FILE_ERROR_OK) {
       callback.Run(FileErrorToNetError(error), scoped_ptr<ResourceEntry>());
     }
   }
 }
 
 }  // namespace drive