Bug 851777 - Don't display a CSS focus ring on <input type=range> when OS X native theming is being used. r=roc

widget/cocoa/nsNativeThemeCocoa.mm

@@ -3021,6 +3021,7 @@ nsNativeThemeCocoa::ThemeDrawsFocusForWidget(nsPresContext* aPresContext, nsIFra
       aWidgetType == NS_THEME_DROPDOWN_TEXTFIELD ||
       aWidgetType == NS_THEME_BUTTON ||
       aWidgetType == NS_THEME_RADIO ||
+      aWidgetType == NS_THEME_RANGE ||
       aWidgetType == NS_THEME_CHECKBOX)
     return true;