MD - Fix coloring of buttons on DL shelf.

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 1932a40dfd53d85e74b0605fd5d29c087a383a2e..a7c2bff07c1705f645c8d294b9970c8305e47bbf 100644
--- a/ui/views/controls/button/md_text_button.h
+++ b/ui/views/controls/button/md_text_button.h
@@ -39,13 +39,14 @@ class VIEWS_EXPORT MdTextButton : public LabelButton {
   void OnNativeThemeChanged(const ui::NativeTheme* theme) override;
   SkColor GetInkDropBaseColor() const override;
   bool ShouldShowInkDropForFocus() const override;
+  void SetEnabledTextColors(SkColor color) override;
   void UpdateStyleToIndicateDefaultStatus() override;
 
  private:
   MdTextButton(ButtonListener* listener);
   ~MdTextButton() override;
 
-  void UpdateColorsFromNativeTheme();
+  void UpdateColors();
 
   // The MD-style 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