Update {virtual,override,final} to follow C++11 style in extensions, round 2.

extensions/shell/browser/shell_audio_controller_chromeos_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 "extensions/shell/browser/shell_audio_controller_chromeos.h"
 
 #include "base/macros.h"
 #include "chromeos/audio/audio_device.h"
 #include "chromeos/audio/audio_devices_pref_handler.h"
 #include "chromeos/audio/cras_audio_handler.h"
@@ skipping 18 matching lines @@
     audio_client_ = new chromeos::FakeCrasAudioClient();
     audio_client_->SetAudioNodesForTesting(AudioNodeList());
     dbus_setter->SetCrasAudioClient(make_scoped_ptr(audio_client_));
 
     chromeos::CrasAudioHandler::InitializeForTesting();
     audio_handler_ = chromeos::CrasAudioHandler::Get();
 
     controller_.reset(new ShellAudioController());
   }
 
-  virtual ~ShellAudioControllerTest() {
+  ~ShellAudioControllerTest() override {
     controller_.reset();
     chromeos::CrasAudioHandler::Shutdown();
     chromeos::DBusThreadManager::Shutdown();
   }
 
  protected:
   // Fills a AudioNode for use by tests.
   AudioNode CreateNode(chromeos::AudioDeviceType type) {
     AudioNode node;
     node.is_input =
@@ skipping 78 matching lines @@
   EXPECT_FALSE(audio_handler_->IsInputMuted());
   EXPECT_EQ(static_cast<double>(
                 chromeos::AudioDevicesPrefHandler::kDefaultOutputVolumePercent),
             audio_handler_->GetOutputVolumePercent());
 
   // TODO(rkc): The default value for gain is wrong. http://crbug.com/442489
   EXPECT_EQ(75.0, audio_handler_->GetInputGainPercent());
 }
 
 }  // namespace extensions