Define frame subscription interface and implementation on Mac

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 f56413e6140e1a673edd60ac3938d6cbd1b5e734..2137829bace9951351bb08d7788090ce1792aadd 100644
--- a/content/browser/renderer_host/render_widget_host_view_base.cc
+++ b/content/browser/renderer_host/render_widget_host_view_base.cc
@@ -465,4 +465,18 @@ void RenderWidgetHostViewBase::ProcessAckedTouchEvent(
     const WebKit::WebTouchEvent& touch, InputEventAckState ack_result) {
 }
 
+bool RenderWidgetHostViewBase::CanSubscribeFrame() const {
+  NOTIMPLEMENTED();
+  return false;
+}
+
+void RenderWidgetHostViewBase::BeginFrameSubscription(
+    RenderWidgetHostViewFrameSubscriber* subscriber) {
+  NOTIMPLEMENTED();
+}
+
+void RenderWidgetHostViewBase::EndFrameSubscription() {
+  NOTIMPLEMENTED();
+}
+
 }  // namespace content