Make Surface creation lazy for OffscreenCanvasFrameReceiverImpl

content/browser/renderer_host/offscreen_canvas_surface_impl.h

 // Copyright 2016 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 CONTENT_BROWSER_RENDERER_HOST_OFFSCREEN_CANVAS_SURFACE_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_OFFSCREEN_CANVAS_SURFACE_IMPL_H_
 
-#include "cc/surfaces/surface_factory.h"
-#include "cc/surfaces/surface_factory_client.h"
 #include "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_id_allocator.h"
 #include "mojo/public/cpp/bindings/interface_request.h"
 #include "mojo/public/cpp/bindings/string.h"
 #include "mojo/public/cpp/bindings/strong_binding.h"
 #include "third_party/WebKit/public/platform/modules/offscreencanvas/offscreen_canvas_surface.mojom.h"
 
 namespace content {
 
-class OffscreenCanvasSurfaceImpl : public blink::mojom::OffscreenCanvasSurface,
-                                   public cc::SurfaceFactoryClient {
+class OffscreenCanvasSurfaceImpl : public blink::mojom::OffscreenCanvasSurface {
  public:
   static void Create(
       mojo::InterfaceRequest<blink::mojom::OffscreenCanvasSurface> request);
 
   // blink::mojom::OffscreenCanvasSurface implementation.
   void GetSurfaceId(const GetSurfaceIdCallback& callback) override;
-  void RequestSurfaceCreation(const cc::SurfaceId& surface_id) override;
   void Require(const cc::SurfaceId& surface_id,
                const cc::SurfaceSequence& sequence) override;
   void Satisfy(const cc::SurfaceSequence& sequence) override;
 
-  // cc::SurfaceFactoryClient implementation.
-  void ReturnResources(const cc::ReturnedResourceArray& resources) override;
-  void WillDrawSurface(const cc::SurfaceId& id,
-                       const gfx::Rect& damage_rect) override;
-  void SetBeginFrameSource(cc::BeginFrameSource* begin_frame_source) override;
-
  private:
   ~OffscreenCanvasSurfaceImpl() override;
   explicit OffscreenCanvasSurfaceImpl(
       mojo::InterfaceRequest<blink::mojom::OffscreenCanvasSurface> request);
 
   // Surface-related state
   std::unique_ptr<cc::SurfaceIdAllocator> id_allocator_;
   cc::SurfaceId surface_id_;
-  std::unique_ptr<cc::SurfaceFactory> surface_factory_;
 
   mojo::StrongBinding<blink::mojom::OffscreenCanvasSurface> binding_;
 
   DISALLOW_COPY_AND_ASSIGN(OffscreenCanvasSurfaceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_OFFSCREEN_CANVAS_SURFACE_IMPL_H_