replace OVERRIDE and FINAL with override and final in ash/

ash/test/test_session_state_animator.cc

Index: ash/test/test_session_state_animator.cc
diff --git a/ash/test/test_session_state_animator.cc b/ash/test/test_session_state_animator.cc
index b1d5b47c4aa22b26ef46445b0759fa832f12200e..2cb6a5cb9d10cf3f105b07aae0fae9d2893dbd06 100644
--- a/ash/test/test_session_state_animator.cc
+++ b/ash/test/test_session_state_animator.cc
@@ -63,7 +63,7 @@ class TestSessionStateAnimator::AnimationSequence
   // ash::SessionStateAnimator::AnimationSequence:
   virtual void StartAnimation(int container_mask,
                               AnimationType type,
-                              AnimationSpeed speed) OVERRIDE {
+                              AnimationSpeed speed) override {
     animator_->StartAnimationInSequence(container_mask, type, speed, this);
   }