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

ui/views/controls/button/md_text_button.h

Index: ui/views/controls/button/md_text_button.h
diff --git a/ui/views/controls/button/md_text_button.h b/ui/views/controls/button/md_text_button.h
index eecbf811249e2a641dafbf77131d26095aff3b82..8350dac7c68a4c172941f51810c8ef32709d64a7 100644
--- a/ui/views/controls/button/md_text_button.h
+++ b/ui/views/controls/button/md_text_button.h
@@ -32,16 +32,10 @@ class VIEWS_EXPORT MdTextButton : public LabelButton {
   void SetCallToAction(CallToAction cta);
 
   // LabelButton:
-  void Layout() override;
   void OnNativeThemeChanged(const ui::NativeTheme* theme) override;
   SkColor GetInkDropBaseColor() const override;
   void SetText(const base::string16& text) override;
 
- protected:
-  // LabelButton:
-  void OnFocus() override;
-  void OnBlur() override;
-
  private:
   MdTextButton(ButtonListener* listener);
   ~MdTextButton() override;
@@ -50,11 +44,6 @@ class VIEWS_EXPORT MdTextButton : public LabelButton {
 
   ButtonInkDropDelegate ink_drop_delegate_;
 
-  // A child view to draw the focus ring. This is not done via a FocusPainter
-  // because it needs to paint to a layer so it can extend beyond the bounds of
-  // |this|.
-  views::View* focus_ring_;
-
   // The call to action style for this button.
   CallToAction cta_;