Move Sky's DataPipeDrainer to mojo/common

mojo/common/data_pipe_drainer.h

 // Copyright 2014 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 SKY_ENGINE_PLATFORM_FETCHER_DATAPIPEDRAINER_H_
-#define SKY_ENGINE_PLATFORM_FETCHER_DATAPIPEDRAINER_H_
+#ifndef MOJO_COMMON_DATA_PIPE_DRAINER_H_
+#define MOJO_COMMON_DATA_PIPE_DRAINER_H_
 
 #include "base/memory/weak_ptr.h"
 #include "mojo/common/handle_watcher.h"
 #include "mojo/public/cpp/system/core.h"
 
-namespace blink {
+namespace mojo {
+namespace common {
 
 class DataPipeDrainer {
  public:
   class Client {
    public:
     virtual void OnDataAvailable(const void* data, size_t num_bytes) = 0;
     virtual void OnDataComplete() = 0;
 
    protected:
     virtual ~Client() { }
   };
 
   DataPipeDrainer(Client*, mojo::ScopedDataPipeConsumerHandle source);
   ~DataPipeDrainer();
 
  private:
   void ReadData();
   void WaitForData();
   void WaitComplete(MojoResult result);
 
   Client* client_;
   mojo::ScopedDataPipeConsumerHandle source_;
   mojo::common::HandleWatcher handle_watcher_;
 
   base::WeakPtrFactory<DataPipeDrainer> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DataPipeDrainer);
 };
 
-}  // namespace blink
+}  // namespace common
+}  // namespace mojo
 
-#endif  // SKY_ENGINE_PLATFORM_FETCHER_DATAPIPEDRAINER_H_
+#endif  // MOJO_COMMON_DATA_PIPE_DRAINER_H_