Add MD ink drop ripple to app list button

ui/views/animation/ink_drop_host_view.h

Index: ui/views/animation/ink_drop_host_view.h
diff --git a/ui/views/animation/ink_drop_host_view.h b/ui/views/animation/ink_drop_host_view.h
index c6334de5912abd181a17ef7b441d92aec9152b78..6535be103b108c08aee268667c7f791bf3c47684 100644
--- a/ui/views/animation/ink_drop_host_view.h
+++ b/ui/views/animation/ink_drop_host_view.h
@@ -60,6 +60,11 @@ class VIEWS_EXPORT InkDropHostView : public View, public InkDropHost {
   // of the InkDrop.
   void SetHasInkDrop(bool has_an_ink_drop);
 
+  // An overload of SetHasInkDrop() that takes an extra argument specifying
+  // whether the default gesture handler should be installed for the ink drop or
+  // not. |handles_gesture_event| can only be true when |has_ink_drop| is true.
+  void SetHasInkDrop(bool has_an_ink_drop, bool handles_gesture_event);
+
   // Animates |ink_drop_| to the desired |ink_drop_state|.
   //
   // TODO(bruthig): Enhance to accept a ui::Event parameter so InkDrops can be