Add AddChildFrameSink() and RemoveChildFrameSink() To WindowAndroidCompositor

content/browser/renderer_host/compositor_impl_android.h

Index: content/browser/renderer_host/compositor_impl_android.h
diff --git a/content/browser/renderer_host/compositor_impl_android.h b/content/browser/renderer_host/compositor_impl_android.h
index 83ff58498eb4a533956229d7dbb147834e06006d..6d49a396a9d8be47d62bc53da8db711ab1200ab8 100644
--- a/content/browser/renderer_host/compositor_impl_android.h
+++ b/content/browser/renderer_host/compositor_impl_android.h
@@ -103,6 +103,8 @@ class CONTENT_EXPORT CompositorImpl
       std::unique_ptr<cc::CopyOutputRequest> request) override;
   void SetNeedsAnimate() override;
   cc::FrameSinkId GetFrameSinkId() override;
+  void AddChildFrameSink(const cc::FrameSinkId& frame_sink_id) override;
+  void RemoveChildFrameSink(const cc::FrameSinkId& frame_sink_id) override;
 
   void SetVisible(bool visible);
   void CreateLayerTreeHost();
@@ -165,6 +167,9 @@ class CONTENT_EXPORT CompositorImpl
   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_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorImpl);