exo: Implement presentation interface.

components/exo/compositor_frame_sink_holder.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 COMPONENTS_EXO_COMPOSITOR_FRAME_SINK_HOLDER_H_
 #define COMPONENTS_EXO_COMPOSITOR_FRAME_SINK_HOLDER_H_
 
 #include <list>
 #include <map>
 #include <memory>
@@ skipping 29 matching lines @@
   void AddResourceReleaseCallback(
       cc::ResourceId id,
       std::unique_ptr<cc::SingleReleaseCallback> callback);
 
   CompositorFrameSink* GetCompositorFrameSink() { return frame_sink_.get(); }
 
   base::WeakPtr<CompositorFrameSinkHolder> GetWeakPtr() {
     return weak_factory_.GetWeakPtr();
   }
 
-  using FrameCallback = base::Callback<void(base::TimeTicks frame_time)>;
-  void ActivateFrameCallbacks(std::list<FrameCallback>* frame_callbacks);
-  void CancelFrameCallbacks();
-
   void SetNeedsBeginFrame(bool needs_begin_frame);
 
   void Satisfy(const cc::SurfaceSequence& sequence);
   void Require(const cc::SurfaceId& id, const cc::SurfaceSequence& sequence);
 
   // Overridden from cc::mojom::MojoCompositorFrameSinkClient:
   void DidReceiveCompositorFrameAck() override;
   void OnBeginFrame(const cc::BeginFrameArgs& args) override;
   void ReclaimResources(const cc::ReturnedResourceArray& resources) override;
   void WillDrawSurface() override;
@@ skipping 21 matching lines @@
   // variables after running and erasing the callbacks.
   using ResourceReleaseCallbackMap =
       std::map<int,
                std::pair<scoped_refptr<CompositorFrameSinkHolder>,
                          std::unique_ptr<cc::SingleReleaseCallback>>>;
   ResourceReleaseCallbackMap release_callbacks_;
 
   Surface* surface_;
   std::unique_ptr<CompositorFrameSink> frame_sink_;
 
-  std::list<FrameCallback> active_frame_callbacks_;
   std::unique_ptr<cc::ExternalBeginFrameSource> begin_frame_source_;
   bool needs_begin_frame_ = false;
   cc::BeginFrameArgs last_begin_frame_args_;
   mojo::Binding<cc::mojom::MojoCompositorFrameSinkClient> binding_;
 
   base::WeakPtrFactory<CompositorFrameSinkHolder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorFrameSinkHolder);
 };
 
 }  // namespace exo
 
 #endif  // COMPONENTS_EXO_COMPOSITOR_FRAME_SINK_HOLDER_H_