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 c3fa8d8cbb9040d5025d6a0c64b14e1d547e69eb..b5e841917728b7ef605615d738bd2ffb4e2d4355 100644
--- a/ui/views/animation/ink_drop_host_view.h
+++ b/ui/views/animation/ink_drop_host_view.h
@@ -38,6 +38,12 @@ class VIEWS_EXPORT InkDropHostView : public View, public InkDropHost {
   void set_ink_drop_size(const gfx::Size& size) { ink_drop_size_ = size; }
 
  protected:
+  enum InkDropType {
+    NO_INK_DROP,
+    INK_DROP_WITHOUT_GESTURE_HANDLING,

[James Cook, 2016/06/27 22:47:28]

I like this much better. Can you add a brief comment explaining why you would
choose with vs. without gesture handling?

[mohsen, 2016/06/29 21:41:37]

Done.

+    INK_DROP_WITH_GESTURE_HANDLING,
+  };
+
   static const int kInkDropSmallCornerRadius;
 
   void set_ink_drop_visible_opacity(float visible_opacity) {
@@ -84,7 +90,7 @@ class VIEWS_EXPORT InkDropHostView : public View, public InkDropHost {
   // Toggle to enable/disable an InkDrop on this View.  Descendants can override
   // CreateInkDropHighlight() and CreateInkDropRipple() to change the look/feel
   // of the InkDrop.
-  void SetHasInkDrop(bool has_an_ink_drop);
+  void SetHasInkDrop(InkDropType ink_drop_type);
 
  private:
   class InkDropGestureHandler;