Standardize usage of virtual/override/final in cc/

cc/base/delayed_unique_notifier_unittest.cc

 // Copyright 2014 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 <deque>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/test/test_pending_task.h"
 #include "base/test/test_simple_task_runner.h"
 #include "cc/base/delayed_unique_notifier.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 namespace {
 
 class TestNotifier : public DelayedUniqueNotifier {
  public:
   TestNotifier(base::SequencedTaskRunner* task_runner,
                const base::Closure& closure,
                const base::TimeDelta& delay)
       : DelayedUniqueNotifier(task_runner, closure, delay) {}
-  virtual ~TestNotifier() {}
+  ~TestNotifier() override {}
 
   // Overridden from DelayedUniqueNotifier:
-  virtual base::TimeTicks Now() const override { return now_; }
+  base::TimeTicks Now() const override { return now_; }
 
   void SetNow(base::TimeTicks now) { now_ = now; }
 
  private:
   base::TimeTicks now_;
 };
 
 class DelayedUniqueNotifierTest : public testing::Test {
  public:
   DelayedUniqueNotifierTest() : notification_count_(0) {}
@@ skipping 220 matching lines @@
   tasks[0].task.Run();
   EXPECT_EQ(1, NotificationCount());
 
   tasks = TakePendingTasks();
   EXPECT_EQ(0u, tasks.size());
   EXPECT_FALSE(notifier.HasPendingNotification());
 }
 
 }  // namespace
 }  // namespace cc