Enabled tests to control material design ink drop animations.

ui/views/animation/ink_drop_animation_controller_impl.h

Index: ui/views/animation/ink_drop_animation_controller_impl.h
diff --git a/ui/views/animation/ink_drop_animation_controller_impl.h b/ui/views/animation/ink_drop_animation_controller_impl.h
index 41bd3f264e97255b4e36dc1c0c487f9d4d723092..e0759750e9fdbf5f727c885366714967298fd32a 100644
--- a/ui/views/animation/ink_drop_animation_controller_impl.h
+++ b/ui/views/animation/ink_drop_animation_controller_impl.h
@@ -19,6 +19,10 @@ class Timer;
 }  // namespace base
 
 namespace views {
+namespace test {
+class InkDropAnimationControllerImplTestApi;
+}  // namespace test
+
 class InkDropAnimation;
 class InkDropHost;
 class InkDropHover;
@@ -42,8 +46,7 @@ class VIEWS_EXPORT InkDropAnimationControllerImpl
   void SetHovered(bool is_hovered) override;
 
  private:
-  friend class InkDropAnimationControllerFactoryTest;
-  friend class InkDropAnimationControllerImplTest;
+  friend class test::InkDropAnimationControllerImplTestApi;
 
   // Destroys |ink_drop_animation_| if it's targeted to the HIDDEN state.
   void DestroyHiddenTargetedAnimations();