Check target value

ash/rotator/screen_rotation_animation.h

Index: ash/rotator/screen_rotation_animation.h
diff --git a/ash/rotator/screen_rotation_animation.h b/ash/rotator/screen_rotation_animation.h
index 66e0df97d6e90f4dfc188aa9115cb8cacc4eb3d9..bd05f603c025871fe0993ff2f435b0e3a0b27fe2 100644
--- a/ash/rotator/screen_rotation_animation.h
+++ b/ash/rotator/screen_rotation_animation.h
@@ -47,6 +47,7 @@ class ASH_EXPORT ScreenRotationAnimation : public ui::LayerAnimationElement {
                   ui::LayerAnimationDelegate* delegate) override;
   void OnGetTarget(TargetValue* target) const override;
   void OnAbort(ui::LayerAnimationDelegate* delegate) override;
+  bool AreStartAndTargetSame() override;
 
   // The root InterpolatedTransform that defines the animation.
   std::unique_ptr<ui::InterpolatedTransform> interpolated_transform_;