[blimp] Add SkPicture caching support.

cc/playback/clip_path_display_item.h

Index: cc/playback/clip_path_display_item.h
diff --git a/cc/playback/clip_path_display_item.h b/cc/playback/clip_path_display_item.h
index 5bbb1f16df36ed7ba06e0719dcf4e262dbd6b95e..e859f799f67b6b62d0a740e61dc6874956e8f4d8 100644
--- a/cc/playback/clip_path_display_item.h
+++ b/cc/playback/clip_path_display_item.h
@@ -18,7 +18,6 @@
 class SkCanvas;
 
 namespace cc {
-class ImageSerializationProcessor;
 
 class CC_EXPORT ClipPathDisplayItem : public DisplayItem {
  public:
@@ -26,9 +25,7 @@ class CC_EXPORT ClipPathDisplayItem : public DisplayItem {
   explicit ClipPathDisplayItem(const proto::DisplayItem& proto);
   ~ClipPathDisplayItem() 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;
@@ -57,9 +54,7 @@ class CC_EXPORT EndClipPathDisplayItem : public DisplayItem {
     return base::WrapUnique(new EndClipPathDisplayItem());
   }
 
-  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;