[MD] Use same focus ring on BarControlButton as MdTextButton.

ui/views/controls/button/label_button.cc

Index: ui/views/controls/button/label_button.cc
diff --git a/ui/views/controls/button/label_button.cc b/ui/views/controls/button/label_button.cc
index 0068e122fa8dceda1f95180d84ac4ea5a7b7a69b..f5b07e474368a2d8484444a0ed37887ddf5a3ff0 100644
--- a/ui/views/controls/button/label_button.cc
+++ b/ui/views/controls/button/label_button.cc
@@ -382,13 +382,13 @@ void LabelButton::OnPaint(gfx::Canvas* canvas) {
 }
 
 void LabelButton::OnFocus() {
-  View::OnFocus();
+  CustomButton::OnFocus();
   // Typically the border renders differently when focused.
   SchedulePaint();
 }
 
 void LabelButton::OnBlur() {
-  View::OnBlur();
+  CustomButton::OnBlur();
   // Typically the border renders differently when focused.
   SchedulePaint();
 }