Incorporate BlobChannel into Blimp image encode/decode pipeline.

blimp/engine/renderer/engine_image_serialization_processor.h

 // Copyright 2016 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 BLIMP_ENGINE_RENDERER_ENGINE_IMAGE_SERIALIZATION_PROCESSOR_H_
 #define BLIMP_ENGINE_RENDERER_ENGINE_IMAGE_SERIALIZATION_PROCESSOR_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "blimp/common/blimp_common_export.h"
 #include "blimp/engine/mojo/blob_channel.mojom.h"
 #include "cc/proto/image_serialization_processor.h"
 #include "third_party/skia/include/core/SkPicture.h"
 
 class SkPixelSerializer;
 
 namespace content {
 class RenderFrame;
 }  // class content
 
 namespace blimp {
 namespace engine {
 
+class BlobChannelSenderHost;
+
 // EngineImageSerializationProcessor provides functionality to serialize and
 // deserialize Skia images.
 class BLIMP_COMMON_EXPORT EngineImageSerializationProcessor
     : public cc::ImageSerializationProcessor {
  public:
   explicit EngineImageSerializationProcessor(
-      mojom::BlobChannelPtr blob_channel);
+      std::unique_ptr<BlobChannelSenderHost> blob_channel);
   ~EngineImageSerializationProcessor();
 
   // cc::ImageSerializationProcessor implementation.
   SkPixelSerializer* GetPixelSerializer() override;
   SkPicture::InstallPixelRefProc GetPixelDeserializer() override;
 
  private:
   std::unique_ptr<SkPixelSerializer> pixel_serializer_;
-  mojom::BlobChannelPtr blob_channel_;
+  std::unique_ptr<BlobChannelSenderHost> blob_channel_;
 
   DISALLOW_COPY_AND_ASSIGN(EngineImageSerializationProcessor);
 };
 
 }  // namespace engine
 }  // namespace blimp
 
 #endif  // BLIMP_ENGINE_RENDERER_ENGINE_IMAGE_SERIALIZATION_PROCESSOR_H_