Implement Main Thread RAF Aligned Input

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 c544c288f698925f521d0de4f33c0d96cafead94..57b970049f49405a0add315da201ca889d79fa77 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -1664,6 +1664,13 @@ void RenderViewImpl::AttachWebFrameWidget(blink::WebFrameWidget* frame_widget) {
   frame_widget_ = frame_widget;
 }
 
+void RenderViewImpl::NeedsMainFrame() {
+  RenderWidgetCompositor* rwc = compositor();
+  if (!rwc)
+    return;
+  rwc->setNeedsBeginFrame();
+}
+
 void RenderViewImpl::SetZoomLevel(double zoom_level) {
   // If we change the zoom level for the view, make sure any subsequent subframe
   // loads reflect the current zoom level.