BrowserMainLoop owns FrameSinkManagerHost

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 "base/callback.h"
 #include "base/compiler_specific.h"
 #include "cc/surfaces/frame_sink_id.h"
 #include "cc/surfaces/surface_info.h"
+#include "components/viz/host/frame_sink_manager_host.h"
 #include "components/viz/host/frame_sink_observer.h"
 #include "content/common/content_export.h"
 #include "mojo/public/cpp/bindings/binding.h"
 #include "third_party/WebKit/public/platform/modules/offscreencanvas/offscreen_canvas_surface.mojom.h"
 
 namespace content {
 
 // The browser owned object for an offscreen canvas connection. Holds
 // connections to both the renderer and frame sink manager.
 class CONTENT_EXPORT OffscreenCanvasSurfaceImpl
     : public blink::mojom::OffscreenCanvasSurface,
       public NON_EXPORTED_BASE(viz::FrameSinkObserver) {
  public:
   using DestroyCallback = base::OnceCallback<void()>;
 
   OffscreenCanvasSurfaceImpl(
+      viz::FrameSinkManagerHost* frame_sink_manager_host,
       const cc::FrameSinkId& parent_frame_sink_id,
       const cc::FrameSinkId& frame_sink_id,
       blink::mojom::OffscreenCanvasSurfaceClientPtr client,
       blink::mojom::OffscreenCanvasSurfaceRequest request,
       DestroyCallback destroy_callback);
   ~OffscreenCanvasSurfaceImpl() override;
 
   const cc::FrameSinkId& frame_sink_id() const { return frame_sink_id_; }
 
   const cc::FrameSinkId& parent_frame_sink_id() const {
@@ skipping 18 matching lines @@
   // blink::mojom::OffscreenCanvasSurface implementation.
   void Require(const cc::SurfaceId& surface_id,
                const cc::SurfaceSequence& sequence) override;
   void Satisfy(const cc::SurfaceSequence& sequence) override;
 
  private:
   // Registered as a callback for when |binding_| is closed. Will call
   // |destroy_callback_|.
   void OnSurfaceConnectionClosed();
 
+  viz::FrameSinkManagerHost* const frame_sink_manager_host_;
+
   blink::mojom::OffscreenCanvasSurfaceClientPtr client_;
   mojo::Binding<blink::mojom::OffscreenCanvasSurface> binding_;
 
   // Private connection for the CompositorFrameSink. The CompositorFrameSink
   // will not be destroyed until both private and offscreen canvas client
   // connections are closed.
   cc::mojom::MojoCompositorFrameSinkPrivatePtr compositor_frame_sink_private_;
 
   // To be called if |binding_| is closed.
   DestroyCallback destroy_callback_;
 
   // Surface-related state
   const cc::FrameSinkId frame_sink_id_;
   cc::LocalSurfaceId local_surface_id_;
   const cc::FrameSinkId parent_frame_sink_id_;
 
   bool has_created_compositor_frame_sink_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(OffscreenCanvasSurfaceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_OFFSCREEN_CANVAS_SURFACE_IMPL_H_