Revamp OffscreenCanvas commit flow

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..f1498fa8a215776f389118c5cb1743788953225c 100644
--- a/content/browser/renderer_host/offscreen_canvas_surface_impl.h
+++ b/content/browser/renderer_host/offscreen_canvas_surface_impl.h
@@ -21,8 +21,13 @@ class CONTENT_EXPORT OffscreenCanvasSurfaceImpl
 
   static void Create(blink::mojom::OffscreenCanvasSurfaceRequest request);
 
+  void OnSurfaceCreated(const cc::SurfaceId& surface_id,
+                        const gfx::Size& frame_size,
+                        float device_scale_factor);
+
   // blink::mojom::OffscreenCanvasSurface implementation.
-  void GetSurfaceId(GetSurfaceIdCallback callback) override;
+  void SetClient(blink::mojom::OffscreenCanvasSurfaceClientPtr,
+                 const cc::FrameSinkId&) override;
   void Require(const cc::SurfaceId& surface_id,
                const cc::SurfaceSequence& sequence) override;
   void Satisfy(const cc::SurfaceSequence& sequence) override;
@@ -30,9 +35,11 @@ class CONTENT_EXPORT OffscreenCanvasSurfaceImpl
   const cc::FrameSinkId& frame_sink_id() const { return frame_sink_id_; }
 
  private:
+  blink::mojom::OffscreenCanvasSurfaceClientPtr client_;
+
   // Surface-related state
-  std::unique_ptr<cc::SurfaceIdAllocator> id_allocator_;
   cc::FrameSinkId frame_sink_id_;
+  cc::LocalFrameId current_local_frame_id_;
 
   DISALLOW_COPY_AND_ASSIGN(OffscreenCanvasSurfaceImpl);
 };