MD - add ripples to DL shelf items

ui/views/animation/button_ink_drop_delegate.h

Index: ui/views/animation/button_ink_drop_delegate.h
diff --git a/ui/views/animation/button_ink_drop_delegate.h b/ui/views/animation/button_ink_drop_delegate.h
index b1e1b5f553175347587c261cec4078e034134856..f4c245ecdc1dac9d4473da1a25150980837eb118 100644
--- a/ui/views/animation/button_ink_drop_delegate.h
+++ b/ui/views/animation/button_ink_drop_delegate.h
@@ -8,6 +8,7 @@
 #include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/events/event_handler.h"
+#include "ui/gfx/geometry/point.h"
 #include "ui/views/animation/ink_drop_delegate.h"
 #include "ui/views/views_export.h"
 
@@ -28,6 +29,13 @@ class VIEWS_EXPORT ButtonInkDropDelegate : public InkDropDelegate,
   ButtonInkDropDelegate(InkDropHost* ink_drop_host, View* view);
   ~ButtonInkDropDelegate() override;
 
+  const gfx::Point& last_ink_drop_location() const {
+    return last_ink_drop_location_;
+  }
+  void set_last_ink_drop_location(const gfx::Point& point) {
+    last_ink_drop_location_ = point;
+  }
+
   // InkDropDelegate:
   void OnAction(InkDropState state) override;
   void SnapToActivated() override;
@@ -44,6 +52,10 @@ class VIEWS_EXPORT ButtonInkDropDelegate : public InkDropDelegate,
   // Parent InkDropHost (typically a View) that hosts the ink ripple animations.
   InkDropHost* ink_drop_host_;
 
+  // Location of the last ink drop triggering event in coordinate system of the
+  // ctor argument |view|.
+  gfx::Point last_ink_drop_location_;
+
   // Animation controller for the ink drop ripple effect.
   scoped_ptr<InkDropAnimationController> ink_drop_animation_controller_;