Getting rid of DelegatedFrameData

cc/surfaces/surface_factory.h

Index: cc/surfaces/surface_factory.h
diff --git a/cc/surfaces/surface_factory.h b/cc/surfaces/surface_factory.h
index 3a6431596bc9cc470e8ef4fdbae1520988543e14..d79d237eb579146f790b0c14709a004f3aaeefd7 100644
--- a/cc/surfaces/surface_factory.h
+++ b/cc/surfaces/surface_factory.h
@@ -71,6 +71,10 @@ class CC_SURFACES_EXPORT SurfaceFactory {
   void RequestCopyOfSurface(const LocalFrameId& local_frame_id,
                             std::unique_ptr<CopyOutputRequest> copy_request);
 
+  // Evicts the current frame on the surface. All the resources
+  // will be released and Surface::HasFrame will return false.
+  void ClearSurface(const LocalFrameId& local_frame_id);
+
   void WillDrawSurface(const LocalFrameId& id, const gfx::Rect& damage_rect);
 
   SurfaceFactoryClient* client() { return client_; }