Remove DidCommitCompositorFrame from RenderViewObserver.

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 2123db99c27e379d061ad222ecc423da699edb7a..1bc99efc9965968e1a55b60b6f9ab9be285448b4 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -3505,11 +3505,6 @@ void RenderViewImpl::OnReleaseDisambiguationPopupBitmap(
   disambiguation_bitmaps_.erase(it);
 }
 
-void RenderViewImpl::DidCommitCompositorFrame() {
-  RenderWidget::DidCommitCompositorFrame();
-  FOR_EACH_OBSERVER(RenderViewObserver, observers_, DidCommitCompositorFrame());
-}
-
 void RenderViewImpl::SendUpdateFaviconURL(const std::vector<FaviconURL>& urls) {
   if (!urls.empty())
     Send(new ViewHostMsg_UpdateFaviconURL(routing_id(), urls));