Added FrameFuture class

android_webview/browser/hardware_renderer.h

Index: android_webview/browser/hardware_renderer.h
diff --git a/android_webview/browser/hardware_renderer.h b/android_webview/browser/hardware_renderer.h
index f1f5e6ce8f1efb7710c6ab7f14feaed35492b67e..4ff23ca8a4c45e11d85a1288e2b4b764ad5269c7 100644
--- a/android_webview/browser/hardware_renderer.h
+++ b/android_webview/browser/hardware_renderer.h
@@ -16,6 +16,7 @@
 struct AwDrawGLInfo;
 
 namespace cc {
+class CompositorFrame;
 class Display;
 class SurfaceFactory;
 class SurfaceIdAllocator;
@@ -67,6 +68,8 @@ class HardwareRenderer : public cc::SurfaceFactoryClient {
   // last frame. The |frame| member may be null if it's already submitted to
   // SurfaceFactory.
   std::unique_ptr<ChildFrame> child_frame_;
+  uint32_t compositor_frame_sink_id_;
+  std::unique_ptr<cc::CompositorFrame> frame_;
 
   const scoped_refptr<SurfacesInstance> surfaces_;
   const std::unique_ptr<cc::SurfaceIdAllocator> surface_id_allocator_;