cc/blimp: Add (de)-serialization for PictureLayer and ScrollbarLayer.

cc/test/remote_client_layer_factory.h

Index: cc/test/remote_client_layer_factory.h
diff --git a/cc/test/remote_client_layer_factory.h b/cc/test/remote_client_layer_factory.h
index 53232bfdad353427d7bfe360da38e466af25134f..ad3607493a14cf8526a3be7a16190b5fa6acf9ab 100644
--- a/cc/test/remote_client_layer_factory.h
+++ b/cc/test/remote_client_layer_factory.h
@@ -20,6 +20,16 @@ class RemoteClientLayerFactory : public LayerFactory {
 
   // LayerFactory implementation.
   scoped_refptr<Layer> CreateLayer(int engine_layer_id) override;
+  scoped_refptr<PictureLayer> CreatePictureLayer(
+      int engine_layer_id,
+      ContentLayerClient* content_layer_client) override;
+  scoped_refptr<SolidColorScrollbarLayer> CreateSolidColorScrollbarLayer(
+      int engine_layer_id,
+      ScrollbarOrientation orientation,
+      int thumb_thickness,
+      int track_start,
+      bool is_left_side_vertical_scrollbar,
+      int scroll_layer_id) override;
 };
 
 }  // namespace cc