Compositing Layer update for OffscreenCanvas resize

content/browser/renderer_host/offscreen_canvas_surface_impl.h

Index: content/browser/renderer_host/offscreen_canvas_surface_impl.h
diff --git a/content/browser/renderer_host/offscreen_canvas_surface_impl.h b/content/browser/renderer_host/offscreen_canvas_surface_impl.h
index 77ddecaf43de8780eeb8fc1a89313d7c67c410ac..a9c23981b41f208c0a7d7d20f53a2dc79b7bd6c5 100644
--- a/content/browser/renderer_host/offscreen_canvas_surface_impl.h
+++ b/content/browser/renderer_host/offscreen_canvas_surface_impl.h
@@ -22,18 +22,27 @@ class CONTENT_EXPORT OffscreenCanvasSurfaceImpl
   static void Create(blink::mojom::OffscreenCanvasSurfaceRequest request);
 
   // blink::mojom::OffscreenCanvasSurface implementation.
-  void GetSurfaceId(GetSurfaceIdCallback callback) override;
+  void GetSurfaceId(blink::mojom::OffscreenCanvasSurfaceClientPtr client,
+                    GetSurfaceIdCallback callback) override;
   void Require(const cc::SurfaceId& surface_id,
                const cc::SurfaceSequence& sequence) override;
   void Satisfy(const cc::SurfaceSequence& sequence) override;
 
   const cc::FrameSinkId& frame_sink_id() const { return frame_sink_id_; }
+  cc::LocalFrameId GenerateLocalFrameId() {
+    return id_allocator_->GenerateId();
+  }
+
+  void OnSurfaceSizeChanged(const cc::SurfaceId& new_surface_id,
+                            gfx::Size new_surface_size);
 
  private:
   // Surface-related state
   std::unique_ptr<cc::SurfaceIdAllocator> id_allocator_;
   cc::FrameSinkId frame_sink_id_;
 
+  blink::mojom::OffscreenCanvasSurfaceClientPtr client_;
+
   DISALLOW_COPY_AND_ASSIGN(OffscreenCanvasSurfaceImpl);
 };