Move Sky's DataPipeDrainer to mojo/common

sky/engine/platform/fetcher/DataPipeDrainer.h

Index: sky/engine/platform/fetcher/DataPipeDrainer.h
diff --git a/sky/engine/platform/fetcher/DataPipeDrainer.h b/sky/engine/platform/fetcher/DataPipeDrainer.h
deleted file mode 100644
index 2f6ce6495d453823127e9320fce2fc5995d4ec91..0000000000000000000000000000000000000000
--- a/sky/engine/platform/fetcher/DataPipeDrainer.h
+++ /dev/null
@@ -1,44 +0,0 @@
-// 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_
-
-#include "base/memory/weak_ptr.h"
-#include "mojo/common/handle_watcher.h"
-#include "mojo/public/cpp/system/core.h"
-
-namespace blink {
-
-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
-
-#endif  // SKY_ENGINE_PLATFORM_FETCHER_DATAPIPEDRAINER_H_