Standardize usage of virtual/override/final specifiers.

components/copresence/mediums/audio/audio_recorder_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 "components/copresence/mediums/audio/audio_recorder.h"
 
 #include "base/bind.h"
 #include "base/memory/aligned_memory.h"
 #include "base/run_loop.h"
 #include "components/copresence/mediums/audio/audio_recorder_impl.h"
@@ skipping 60 matching lines @@
 
 namespace copresence {
 
 class AudioRecorderTest : public testing::Test {
  public:
   AudioRecorderTest() : total_samples_(0), recorder_(NULL) {
     if (!media::AudioManager::Get())
       media::AudioManager::CreateForTesting();
   }
 
-  virtual ~AudioRecorderTest() {
+  ~AudioRecorderTest() override {
     DeleteRecorder();
     for (size_t i = 0; i < channel_data_.size(); ++i)
       base::AlignedFree(channel_data_[i]);
   }
 
   void CreateSimpleRecorder() {
     DeleteRecorder();
     recorder_ = new AudioRecorderImpl();
     recorder_->Initialize(
         base::Bind(&AudioRecorderTest::DecodeSamples, base::Unretained(this)));
@@ skipping 154 matching lines @@
       kDefaultChannels, kDefaultSampleRate, kDefaultBitsPerSample, kNumSamples);
 
   RecordAndVerifySamples();
 
   DeleteRecorder();
 }
 
 // TODO(rkc): Add tests with recording different sample rates.
 
 }  // namespace copresence