OnDrawHardware() implementation with async messages

content/renderer/android/synchronous_compositor_proxy.h

Index: content/renderer/android/synchronous_compositor_proxy.h
diff --git a/content/renderer/android/synchronous_compositor_proxy.h b/content/renderer/android/synchronous_compositor_proxy.h
index 6058aad9adcfd164550c3ba093a36da7a1b8ecb0..bc04d77d6a24c8895352bc371f45a64aecc7bea6 100644
--- a/content/renderer/android/synchronous_compositor_proxy.h
+++ b/content/renderer/android/synchronous_compositor_proxy.h
@@ -73,8 +73,9 @@ class SynchronousCompositorProxy
   // IPC handlers.
   void PopulateCommonParams(SyncCompositorCommonRendererParams* params) const;
   void OnComputeScroll(base::TimeTicks animation_time);
-  void DemandDrawHw(const SyncCompositorDemandDrawHwParams& params,
-                    IPC::Message* reply_message);
+  void DemandDrawHw(const SyncCompositorDemandDrawHwParams& params);
+  void DemandDrawHw_Sync(const SyncCompositorDemandDrawHwParams& params,
+                         IPC::Message* reply_message);
   void SetSharedMemory(
       const SyncCompositorSetSharedMemoryParams& params,
       bool* success,
@@ -88,10 +89,14 @@ class SynchronousCompositorProxy
       SyncCompositorCommonRendererParams* common_renderer_params);
   void SetScroll(const gfx::ScrollOffset& total_scroll_offset);
 
+  void SwapBuffersHw_Sync(uint32_t output_surface_id,
+                          cc::CompositorFrame frame);
   void SwapBuffersHw(uint32_t output_surface_id, cc::CompositorFrame frame);
+  void SendDemandDrawHwReply_Sync(cc::CompositorFrame frame,
+                                  uint32_t output_surface_id,
+                                  IPC::Message* reply_message);
   void SendDemandDrawHwReply(cc::CompositorFrame frame,
-                             uint32_t output_surface_id,
-                             IPC::Message* reply_message);
+                             uint32_t output_surface_id);
   void DoDemandDrawSw(const SyncCompositorDemandDrawSwParams& params);
   void SwapBuffersSw(cc::CompositorFrame frame);
   void SendDemandDrawSwReply(bool success,
@@ -107,6 +112,7 @@ class SynchronousCompositorProxy
   bool inside_receive_;
   IPC::Message* hardware_draw_reply_;
   IPC::Message* software_draw_reply_;
+  bool hardware_draw_reply_async_;
 
   // From browser.
   std::unique_ptr<SharedMemoryWithSize> software_draw_shm_;