Standardize usage of virtual/override/final specifiers.

content/renderer/media/render_media_log_unittest.cc

 // Copyright (c) 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 "base/test/simple_test_tick_clock.h"
 #include "content/common/view_messages.h"
 #include "content/public/test/mock_render_thread.h"
 #include "content/renderer/media/render_media_log.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
 class RenderMediaLogTest : public testing::Test {
  public:
   RenderMediaLogTest()
       : log_(new RenderMediaLog()),
         tick_clock_(new base::SimpleTestTickClock()) {
     log_->SetTickClockForTesting(scoped_ptr<base::TickClock>(tick_clock_));
   }
 
-  virtual ~RenderMediaLogTest() {}
+  ~RenderMediaLogTest() override {}
 
   void AddEvent(media::MediaLogEvent::Type type) {
     log_->AddEvent(log_->CreateEvent(type));
   }
 
   void Advance(base::TimeDelta delta) { tick_clock_->Advance(delta); }
 
   int message_count() { return render_thread_.sink().message_count(); }
 
   std::vector<media::MediaLogEvent> GetMediaLogEvents() {
@@ skipping 63 matching lines @@
   // event.
   std::vector<media::MediaLogEvent> events = GetMediaLogEvents();
   ASSERT_EQ(4u, events.size());
   EXPECT_EQ(media::MediaLogEvent::LOAD, events[0].type);
   EXPECT_EQ(media::MediaLogEvent::SEEK, events[1].type);
   EXPECT_EQ(media::MediaLogEvent::PLAY, events[2].type);
   EXPECT_EQ(media::MediaLogEvent::BUFFERED_EXTENTS_CHANGED, events[3].type);
 }
 
 }  // namespace content