[blimp] Add SkPicture caching support.

cc/playback/display_item.h

Index: cc/playback/display_item.h
diff --git a/cc/playback/display_item.h b/cc/playback/display_item.h
index bc1eae605bd93d348e1a260873d0f22088dde034..0ff33e4f57455acfaeecfb0b36177c3d41519d7b 100644
--- a/cc/playback/display_item.h
+++ b/cc/playback/display_item.h
@@ -17,7 +17,7 @@
 class SkCanvas;
 
 namespace cc {
-class ImageSerializationProcessor;
+class EnginePictureCache;
 
 namespace proto {
 class DisplayItem;
@@ -27,9 +27,11 @@ class CC_EXPORT DisplayItem {
  public:
   virtual ~DisplayItem() {}
 
-  virtual void ToProtobuf(
-      proto::DisplayItem* proto,
-      ImageSerializationProcessor* image_serialization_processor) const = 0;
+  virtual void ToProtobuf(proto::DisplayItem* proto) const = 0;
+  virtual void MarkForRegistrationEngine(
+      EnginePictureCache* engine_picture_cache) const;
+  virtual void MarkForUnregistrationEngine(
+      EnginePictureCache* engine_picture_cache) const;
   virtual void Raster(SkCanvas* canvas,
                       const gfx::Rect& canvas_target_playback_rect,
                       SkPicture::AbortCallback* callback) const = 0;