Adds BeginFrameControl via DevTools.

content/browser/renderer_host/render_widget_host_view_aura.cc

Index: content/browser/renderer_host/render_widget_host_view_aura.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_aura.cc b/content/browser/renderer_host/render_widget_host_view_aura.cc
index 11a325dc481520bd809dc76b00d892d1f5e58f8c..1c0fdb66869a414393e4a56f650e90a5c92752a6 100644
--- a/content/browser/renderer_host/render_widget_host_view_aura.cc
+++ b/content/browser/renderer_host/render_widget_host_view_aura.cc
@@ -939,6 +939,9 @@ void RenderWidgetHostViewAura::OnSwapCompositorFrame(
                                             std::move(frame));
   SelectionUpdated(selection.is_editable, selection.is_empty_text_form_control,
                    selection.start, selection.end);
+
+  if (begin_frame_source_)
+    begin_frame_source_->DidFinishFrame(this, 0);
 }
 
 void RenderWidgetHostViewAura::ClearCompositorFrame() {