WIP: Propagate SurfaceID up window tree hierarchy

content/browser/renderer_host/render_widget_host_view_base.cc

Index: content/browser/renderer_host/render_widget_host_view_base.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_base.cc b/content/browser/renderer_host/render_widget_host_view_base.cc
index 1b263981d6c88b9f2b9a5f77435225a1cb8ff074..292087df62bcaaeb01056b98e027d4e7bb9031c1 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.cc
+++ b/content/browser/renderer_host/render_widget_host_view_base.cc
@@ -417,16 +417,16 @@ ScreenOrientationValues RenderWidgetHostViewBase::GetOrientationTypeForDesktop(
 void RenderWidgetHostViewBase::OnDidNavigateMainFrameToNewPage() {
 }
 
-uint32_t RenderWidgetHostViewBase::GetSurfaceClientId() {
-  return 0;
+cc::FrameSinkId RenderWidgetHostViewBase::GetFrameSinkId() {
+  return cc::FrameSinkId();
 }
 
-uint32_t RenderWidgetHostViewBase::SurfaceClientIdAtPoint(
+cc::FrameSinkId RenderWidgetHostViewBase::FrameSinkIdAtPoint(
     cc::SurfaceHittestDelegate* delegate,
     const gfx::Point& point,
     gfx::Point* transformed_point) {
   NOTREACHED();
-  return 0;
+  return cc::FrameSinkId();
 }
 
 gfx::Point RenderWidgetHostViewBase::TransformPointToRootCoordSpace(