Notifying the Out of Process Renderer about Visibility Change of a Remote Frame

content/renderer/render_frame_proxy.h

Index: content/renderer/render_frame_proxy.h
diff --git a/content/renderer/render_frame_proxy.h b/content/renderer/render_frame_proxy.h
index 0c35670a944bf7fd716814959c5e2c07c7750cde..42dff4a9a15b17c5cc03e1f70604fa376e5b9f0d 100644
--- a/content/renderer/render_frame_proxy.h
+++ b/content/renderer/render_frame_proxy.h
@@ -132,6 +132,7 @@ class CONTENT_EXPORT RenderFrameProxy
                 bool should_replace_current_entry) override;
   void forwardInputEvent(const blink::WebInputEvent* event) override;
   void frameRectsChanged(const blink::WebRect& frame_rect) override;
+  void visibilityChanged(bool visible) override;
   void didChangeOpener(blink::WebFrame* opener) override;
   void advanceFocus(blink::WebFocusType type,
                     blink::WebLocalFrame* source) override;