Getting rid of DelegatedFrameData

cc/surfaces/surface_factory.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_SURFACES_SURFACE_FACTORY_H_
 #define CC_SURFACES_SURFACE_FACTORY_H_
 
 #include <memory>
 #include <set>
 #include <unordered_map>
@@ skipping 53 matching lines @@
   // A frame can only be submitted to a surface created by this factory,
   // although the frame may reference surfaces created by other factories.
   // The callback is called the first time this frame is used to draw, or if
   // the frame is discarded.
   void SubmitCompositorFrame(const LocalFrameId& local_frame_id,
                              CompositorFrame frame,
                              const DrawCallback& callback);
   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_; }
 
   void ReceiveFromChild(const TransferableResourceArray& resources);
   void RefResources(const TransferableResourceArray& resources);
   void UnrefResources(const ReturnedResourceArray& resources);
 
   SurfaceManager* manager() { return manager_; }
 
@@ skipping 20 matching lines @@
   OwningSurfaceMap surface_map_;
 
   base::WeakPtrFactory<SurfaceFactory> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfaceFactory);
 };
 
 }  // namespace cc
 
 #endif  // CC_SURFACES_SURFACE_FACTORY_H_