Standardize usage of virtual/override/final specifiers.

media/cast/logging/logging_impl_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 <stdint.h>
 
 #include <vector>
 
 #include "base/rand_util.h"
 #include "base/test/simple_test_tick_clock.h"
@@ skipping 15 matching lines @@
 static const int64 kStartMillisecond = INT64_C(12345678900000);
 
 class LoggingImplTest : public ::testing::Test {
  protected:
   LoggingImplTest() {
     testing_clock_.Advance(
         base::TimeDelta::FromMilliseconds(kStartMillisecond));
     logging_.AddRawEventSubscriber(&event_subscriber_);
   }
 
-  virtual ~LoggingImplTest() {
+  ~LoggingImplTest() override {
     logging_.RemoveRawEventSubscriber(&event_subscriber_);
   }
 
   LoggingImpl logging_;
   base::SimpleTestTickClock testing_clock_;
   SimpleEventSubscriber event_subscriber_;
 
   DISALLOW_COPY_AND_ASSIGN(LoggingImplTest);
 };
 
@@ skipping 178 matching lines @@
   EXPECT_EQ(1u, frame_events.size());
   frame_events.clear();
   event_subscriber_2.GetFrameEventsAndReset(&frame_events);
   EXPECT_EQ(1u, frame_events.size());
 
   logging_.RemoveRawEventSubscriber(&event_subscriber_2);
 }
 
 }  // namespace cast
 }  // namespace media