[blimp] Add SkPicture caching support.

cc/proto/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 CC_PROTO_IMAGE_SERIALIZATION_PROCESSOR_H_
-#define CC_PROTO_IMAGE_SERIALIZATION_PROCESSOR_H_
-
-#include "third_party/skia/include/core/SkPicture.h"
-
-class SkPixelSerializer;
-
-namespace cc {
-
-// ImageSerializationProcessor provides functionality to serialize and
-// deserialize Skia images.
-class ImageSerializationProcessor {
- public:
-  // The serializer returned from this function can be used to pass in to
-  // SkPicture::serialize(...) for serializing the SkPicture to a stream.
-  virtual SkPixelSerializer* GetPixelSerializer() = 0;
-
-  // Returns a function pointer valid to use for deserializing images when using
-  // SkPicture::CreateFromStream to create an SkPicture from a stream.
-  virtual SkPicture::InstallPixelRefProc GetPixelDeserializer() = 0;
-};
-
-}  // namespace cc
-
-#endif  // CC_PROTO_IMAGE_SERIALIZATION_PROCESSOR_H_