[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 5065ea94d9a00f4a271f3e8c680155af434c5b1d..42d6a51603fbb1dc85a312b280944c80fc449097 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,
               const gfx::Rect& canvas_target_playback_rect,
               SkPicture::AbortCallback* callback) const override;
@@ -54,9 +51,7 @@ 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,
               const gfx::Rect& canvas_target_playback_rect,
               SkPicture::AbortCallback* callback) const override;