Back PaintRecord with PaintOpBuffer instead of SkPicture

cc/paint/paint_image.h

 // Copyright 2017 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_PAINT_PAINT_IMAGE_H_
 #define CC_PAINT_PAINT_IMAGE_H_
 
 #include "cc/paint/paint_export.h"
 
 #include "third_party/skia/include/core/SkImage.h"
 
 namespace cc {
 
 // TODO(vmpstr): Add a persistent id to the paint image.
 class CC_PAINT_EXPORT PaintImage {
  public:
   // TODO(vmpstr): Work towards removing "UNKNOWN" value.
   enum class AnimationType { UNKNOWN, ANIMATED, VIDEO, STATIC };
 
   // TODO(vmpstr): Work towards removing "UNKNOWN" value.
   enum class CompletionState { UNKNOWN, DONE, PARTIALLY_DONE };
 
   PaintImage(sk_sp<const SkImage> sk_image,
              AnimationType animation_type,
              CompletionState completion_state);
+  PaintImage(const PaintImage& image);
   ~PaintImage();
 
   const sk_sp<const SkImage>& sk_image() const { return sk_image_; }
   AnimationType animation_type() const { return animation_type_; }
   CompletionState completion_state() const { return completion_state_; }
 
  private:
   sk_sp<const SkImage> sk_image_;
   AnimationType animation_type_;
   CompletionState completion_state_;
 };
 
 }  // namespace cc
 
 #endif  // CC_PAINT_PAINT_IMAGE_H_