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 eaffa6efa2bd7041814cdb0b3128ccbf57333022..687de5e43f5c9ba783c4f65c247c21f07ddbfe2e 100644
--- a/ui/views/controls/button/md_text_button.h
+++ b/ui/views/controls/button/md_text_button.h
@@ -48,13 +48,14 @@ class VIEWS_EXPORT MdTextButton : public LabelButton {
       const 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