PageVisibilityChanged  215 content/renderer/pepper/pepper_plugin_instance_impl.h   void PageVisibilityChanged(bool is_visible);
PageVisibilityChanged 3960 content/renderer/render_view_impl.cc     (*i)->PageVisibilityChanged(false);
PageVisibilityChanged 3987 content/renderer/render_view_impl.cc     (*i)->PageVisibilityChanged(true);