Implement aura::WindowPortMus::CreateCompositorFrameSink()

ui/aura/mus/window_port_mus.h

Index: ui/aura/mus/window_port_mus.h
diff --git a/ui/aura/mus/window_port_mus.h b/ui/aura/mus/window_port_mus.h
index 4af5ba6564360708e9bfc687c0f4028d6ec4d467..5d5ff7489ed29978dcf4cd3121481c641e2d75c2 100644
--- a/ui/aura/mus/window_port_mus.h
+++ b/ui/aura/mus/window_port_mus.h
@@ -76,10 +76,6 @@ class AURA_EXPORT WindowPortMus : public WindowPort, public WindowMus {
              uint32_t flags,
              const ui::mojom::WindowTree::EmbedCallback& callback);
 
-  std::unique_ptr<cc::CompositorFrameSink> RequestCompositorFrameSink(
-      scoped_refptr<cc::ContextProvider> context_provider,
-      gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager);
-
  private:
   friend class WindowPortMusTestApi;
   friend class WindowTreeClient;
@@ -250,7 +246,9 @@ class AURA_EXPORT WindowPortMus : public WindowPort, public WindowMus {
   void OnPropertyChanged(const void* key,
                          int64_t old_value,
                          std::unique_ptr<ui::PropertyData> data) override;
-  std::unique_ptr<cc::CompositorFrameSink> CreateCompositorFrameSink() override;
+  std::unique_ptr<cc::CompositorFrameSink> CreateCompositorFrameSink(
+      scoped_refptr<cc::ContextProvider> context_provider,
+      gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager) override;
   cc::SurfaceId GetSurfaceId() const override;
   void OnWindowAddedToRootWindow() override {}
   void OnWillRemoveWindowFromRootWindow() override {}