Standardize usage of virtual/override/final in cc/

cc/animation/layer_animation_controller_unittest.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/animation/layer_animation_controller.h"
 
 #include "cc/animation/animation.h"
 #include "cc/animation/animation_curve.h"
 #include "cc/animation/animation_delegate.h"
 #include "cc/animation/animation_registrar.h"
@@ skipping 841 matching lines @@
   event = GetMostRecentPropertyUpdateEvent(events.get());
   EXPECT_FALSE(event);
 }
 
 class FakeAnimationDelegate : public AnimationDelegate {
  public:
   FakeAnimationDelegate()
       : started_(false),
         finished_(false) {}
 
-  virtual void NotifyAnimationStarted(TimeTicks monotonic_time,
-                                      Animation::TargetProperty target_property,
-                                      int group) override {
+  void NotifyAnimationStarted(TimeTicks monotonic_time,
+                              Animation::TargetProperty target_property,
+                              int group) override {
     started_ = true;
   }
 
-  virtual void NotifyAnimationFinished(
-      TimeTicks monotonic_time,
-      Animation::TargetProperty target_property,
-      int group) override {
+  void NotifyAnimationFinished(TimeTicks monotonic_time,
+                               Animation::TargetProperty target_property,
+                               int group) override {
     finished_ = true;
   }
 
   bool started() { return started_; }
 
   bool finished() { return finished_; }
 
  private:
   bool started_;
   bool finished_;
@@ skipping 1458 matching lines @@
   EXPECT_FALSE(controller->IsAnimatingProperty(Animation::Opacity));
   EXPECT_FALSE(controller->IsAnimatingProperty(Animation::Filter));
 
   controller->Animate(kInitialTickTime + TimeDelta::FromMilliseconds(2000));
   controller->UpdateState(true, nullptr);
   EXPECT_TRUE(controller->IsAnimatingProperty(Animation::Opacity));
 }
 
 }  // namespace
 }  // namespace cc