OnDrawHardware() implementation with async messages

content/browser/android/synchronous_compositor_host.h

Index: content/browser/android/synchronous_compositor_host.h
diff --git a/content/browser/android/synchronous_compositor_host.h b/content/browser/android/synchronous_compositor_host.h
index caf0bc25de05021e4406ed875fb9e868e4f74a07..261593213b81d3d1039a37b02ca54e5ca76cd1d3 100644
--- a/content/browser/android/synchronous_compositor_host.h
+++ b/content/browser/android/synchronous_compositor_host.h
@@ -58,6 +58,10 @@ class SynchronousCompositorHost : public SynchronousCompositor {
       const gfx::Size& viewport_size,
       const gfx::Rect& viewport_rect_for_tile_priority,
       const gfx::Transform& transform_for_tile_priority) override;
+  void DemandDrawHwAsync(
+      const gfx::Size& viewport_size,
+      const gfx::Rect& viewport_rect_for_tile_priority,
+      const gfx::Transform& transform_for_tile_priority) override;
   bool DemandDrawSw(SkCanvas* canvas) override;
   void ReturnResources(uint32_t output_surface_id,
                        const cc::ReturnedResourceArray& resources) override;
@@ -89,6 +93,11 @@ class SynchronousCompositorHost : public SynchronousCompositor {
   bool DemandDrawSwInProc(SkCanvas* canvas);
   void SetSoftwareDrawSharedMemoryIfNeeded(size_t stride, size_t buffer_size);
   void SendZeroMemory();
+  SynchronousCompositor::Frame DemandDrawHwHelper(
+      uint32_t output_surface_id,
+      const cc::CompositorFrame& compositor_frame);
+  void DemandDrawHwReceiveFrame(uint32_t output_surface_id,
+                                const cc::CompositorFrame& compositor_frame);
 
   RenderWidgetHostViewAndroid* const rwhva_;
   SynchronousCompositorClient* const client_;