[blimp] Add SkPicture caching support.

cc/playback/transform_display_item.h

Index: cc/playback/transform_display_item.h
diff --git a/cc/playback/transform_display_item.h b/cc/playback/transform_display_item.h
index c547332ecc0a4e3e21deff644099dc28d75d9738..661c5fd3f02ae48d8d06940bc496765250a5d6f0 100644
--- a/cc/playback/transform_display_item.h
+++ b/cc/playback/transform_display_item.h
@@ -17,7 +17,6 @@
 class SkCanvas;
 
 namespace cc {
-class ImageSerializationProcessor;
 
 class CC_EXPORT TransformDisplayItem : public DisplayItem {
  public:
@@ -25,9 +24,7 @@ class CC_EXPORT TransformDisplayItem : public DisplayItem {
   explicit TransformDisplayItem(const proto::DisplayItem& proto);
   ~TransformDisplayItem() override;
 
-  void ToProtobuf(proto::DisplayItem* proto,
-                  ImageSerializationProcessor* image_serialization_processor)
-      const override;
+  void ToProtobuf(proto::DisplayItem* proto) const override;
   void Raster(SkCanvas* canvas,
               SkPicture::AbortCallback* callback) const override;
   void AsValueInto(const gfx::Rect& visual_rect,
@@ -52,9 +49,7 @@ class CC_EXPORT EndTransformDisplayItem : public DisplayItem {
     return base::WrapUnique(new EndTransformDisplayItem());
   }
 
-  void ToProtobuf(proto::DisplayItem* proto,
-                  ImageSerializationProcessor* image_serialization_processor)
-      const override;
+  void ToProtobuf(proto::DisplayItem* proto) const override;
   void Raster(SkCanvas* canvas,
               SkPicture::AbortCallback* callback) const override;
   void AsValueInto(const gfx::Rect& visual_rect,