visibilityState   629 content/renderer/render_frame_impl.cc         render_view_->visibilityState(), false);
visibilityState  2185 content/renderer/render_frame_impl.cc   extra_data->set_visibility_state(render_view_->visibilityState());
visibilityState  2983 content/renderer/render_view_impl.cc   return visibilityState();
visibilityState  3955 content/renderer/render_view_impl.cc     webview()->setVisibilityState(visibilityState(), false);
visibilityState  3982 content/renderer/render_view_impl.cc     webview()->setVisibilityState(visibilityState(), false);
visibilityState   503 content/renderer/render_view_impl.h   virtual blink::WebPageVisibilityState visibilityState() const;