android: Add draw completion for CompositorView

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>
@@ skipping 107 matching lines @@
 #if defined(ENABLE_VULKAN)
   void CreateVulkanOutputSurface();
 #endif
   void OnGpuChannelEstablished(
       scoped_refptr<gpu::GpuChannelHost> gpu_channel_host);
   void OnGpuChannelTimeout();
   void InitializeDisplay(
       std::unique_ptr<cc::OutputSurface> display_output_surface,
       scoped_refptr<cc::VulkanContextProvider> vulkan_context_provider,
       scoped_refptr<cc::ContextProvider> context_provider);
+  void DidSwapBuffers();
 
   bool HavePendingReadbacks();
   void SetBackgroundColor(int color);
 
   cc::FrameSinkId frame_sink_id_;
 
   // root_layer_ is the persistent internal root layer, while subroot_layer_
   // is the one attached by the compositor client.
   scoped_refptr<cc::Layer> subroot_layer_;
 
@@ skipping 39 matching lines @@
   std::unordered_set<cc::FrameSinkId, cc::FrameSinkIdHash>
       pending_child_frame_sink_ids_;
   base::WeakPtrFactory<CompositorImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorImpl);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_COMPOSITOR_IMPL_ANDROID_H_