[ash-md] Changed the style of ink drop applied to system menu icon buttons.

ui/views/animation/ink_drop_highlight.h

Index: ui/views/animation/ink_drop_highlight.h
diff --git a/ui/views/animation/ink_drop_highlight.h b/ui/views/animation/ink_drop_highlight.h
index 18a80b4a631e825f3fe28027e8cac1704207e11d..306d56500843d25cb411989cc85024ee8a17a841 100644
--- a/ui/views/animation/ink_drop_highlight.h
+++ b/ui/views/animation/ink_drop_highlight.h
@@ -59,6 +59,10 @@ class VIEWS_EXPORT InkDropHighlight {
 
   void set_explode_size(const gfx::Size& size) { explode_size_ = size; }
 
+  void set_visible_opacity(float visible_opacity) {
+    visible_opacity_ = visible_opacity;
+  }
+
   // Returns true if the highlight animation is either in the process of fading
   // in or is fully visible.
   bool IsFadingInOrVisible() const;