Refactoring to make adding ink drop animations easier

ui/views/view.h

Index: ui/views/view.h
diff --git a/ui/views/view.h b/ui/views/view.h
index 9d43e2cea038fb87a009c9a7a41423c2650bd91f..663818efd953c1a59d238ada14394056ef899bb1 100644
--- a/ui/views/view.h
+++ b/ui/views/view.h
@@ -67,6 +67,7 @@ class ContextMenuController;
 class DragController;
 class FocusManager;
 class FocusTraversable;
+class InkDropDelegate;
 class LayoutManager;
 class NativeViewAccessibility;
 class ScrollView;
@@ -1134,6 +1135,10 @@ class VIEWS_EXPORT View : public ui::LayerDelegate,
   // below layers owned by a view.
   virtual void ReorderChildLayers(ui::Layer* parent_layer);
 
+  // Animations ----------------------------------------------------------------
+
+  virtual InkDropDelegate* GetInkDropDelegate() const;
+
   // Input ---------------------------------------------------------------------
 
   virtual DragInfo* GetDragInfo();