Add MD ink drop ripple to shelf app items

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index 6b45c6313baf3bee9f08047d3891e28b35de22d1..327243e9b16e55d430199902418176115d4ea15f 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -323,6 +323,11 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   // . SetPaintToLayer(true) has been invoked.
   // View creates the Layer only when it exists in a Widget with a non-NULL
   // Compositor.
+  // TODO(mohsen): Consider making this robust against multiple places changing
+  // it at the same time. For example, class A might set this to true, then
+  // class B sets it to true. Then if class A sets it to false, the layer would
+  // be destroyed and class B might run into problems assuming it is still
+  // painting to layer.

[sadrul, 2016/06/16 15:56:27]

We should not do this here. Normally, there would be just one place where this
decision is made for a View. This extra checks should live in the places where
something else also needs to affect this decision.

[mohsen, 2016/06/16 16:28:47]

OK. Removed.

   void SetPaintToLayer(bool paint_to_layer);
 
   // Overridden from ui::LayerOwner: