Convert offscreen canvas to use FrameSinkManagerHost.

content/browser/renderer_host/offscreen_canvas_surface_factory_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_FACTORY_IMPL_H_
-#define CONTENT_BROWSER_RENDERER_HOST_OFFSCREEN_CANVAS_SURFACE_FACTORY_IMPL_H_
-
-#include "cc/ipc/display_compositor.mojom.h"
-#include "third_party/WebKit/public/platform/modules/offscreencanvas/offscreen_canvas_surface.mojom.h"
-
-namespace content {
-
-class OffscreenCanvasSurfaceFactoryImpl
-    : public blink::mojom::OffscreenCanvasSurfaceFactory {
- public:
-  OffscreenCanvasSurfaceFactoryImpl() {}
-  ~OffscreenCanvasSurfaceFactoryImpl() override {}
-
-  static void Create(
-      blink::mojom::OffscreenCanvasSurfaceFactoryRequest request);
-
-  // blink::mojom::OffscreenCanvasSurfaceFactory implementation.
-  void CreateOffscreenCanvasSurface(
-      const cc::FrameSinkId& parent_frame_sink_id,
-      const cc::FrameSinkId& frame_sink_id,
-      cc::mojom::DisplayCompositorClientPtr client,
-      blink::mojom::OffscreenCanvasSurfaceRequest request) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(OffscreenCanvasSurfaceFactoryImpl);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_RENDERER_HOST_OFFSCREEN_CANVAS_SURFACE_FACTORY_IMPL_H_