DirectCompositorFrameSink Uses CompositorFrameSinkSupport

content/browser/renderer_host/compositor_impl_android.h

 // Copyright (c) 2012 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_COMPOSITOR_IMPL_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_
 
 #include <stddef.h>
 
 #include <memory>
+#include <unordered_set>
 
 #include "base/cancelable_callback.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/timer/timer.h"
 #include "cc/surfaces/frame_sink_id.h"
 #include "cc/trees/layer_tree_host_client.h"
 #include "cc/trees/layer_tree_host_single_thread_client.h"
@@ skipping 75 matching lines @@
   // LayerTreeHostSingleThreadClient implementation.
   void DidSubmitCompositorFrame() override;
   void DidLoseCompositorFrameSink() override;
 
   // WindowAndroidCompositor implementation.
   void AttachLayerForReadback(scoped_refptr<cc::Layer> layer) override;
   void RequestCopyOfOutputOnRootLayer(
       std::unique_ptr<cc::CopyOutputRequest> request) override;
   void SetNeedsAnimate() override;
   cc::FrameSinkId GetFrameSinkId() override;
+  void AddChildFrameSink(cc::FrameSinkId frame_sink_id) override;
 
   void SetVisible(bool visible);
   void CreateLayerTreeHost();
 
   void HandlePendingCompositorFrameSinkRequest();
 
 #if defined(ENABLE_VULKAN)
   void CreateVulkanOutputSurface();
 #endif
   void OnGpuChannelEstablished(
@@ skipping 42 matching lines @@
 
   size_t num_successive_context_creation_failures_;
 
   // Whether there is an CompositorFrameSink request pending from the current
   // |host_|. Becomes |true| if RequestNewCompositorFrameSink is called, and
   // |false| if |host_| is deleted or we succeed in creating *and* initializing
   // a CompositorFrameSink (which is essentially the contract with cc).
   bool compositor_frame_sink_request_pending_;
 
   gpu::Capabilities gpu_capabilities_;
+  bool has_compositor_frame_sink_ = false;
+  std::unordered_set<cc::FrameSinkId, cc::FrameSinkIdHash>
+      pending_child_frame_sink_ids_;
+
   base::WeakPtrFactory<CompositorImpl> weak_factory_;
-

[boliu, 2017/01/26 22:39:41]

nit: don't remove this blank line

[Alex Z., 2017/01/27 20:27:02]

Done.

   DISALLOW_COPY_AND_ASSIGN(CompositorImpl);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_