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 c223a699915d607857bcd6a496c38a272109aad2..5769c3bdcf0f6400f3384c99de1b9db0f217a228 100644
--- a/ui/views/animation/ink_drop_animation_controller_impl.h
+++ b/ui/views/animation/ink_drop_animation_controller_impl.h
@@ -18,6 +18,10 @@ class Timer;
 }  // namespace base
 
 namespace views {
+namespace test {
+class InkDropAnimationControllerImplTestApi;
+}  // namespace test
+
 class InkDropAnimation;
 class InkDropHost;
 class InkDropHover;
@@ -41,8 +45,7 @@ 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();