Update {virtual,override,final} to follow C++11 style.

chrome/browser/speech/tts_android.h

 // Copyright (c) 2013 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.
 
 #ifndef CHROME_BROWSER_SPEECH_TTS_ANDROID_H_
 #define CHROME_BROWSER_SPEECH_TTS_ANDROID_H_
 
 #include "base/android/jni_android.h"
 #include "base/android/scoped_java_ref.h"
 #include "chrome/browser/speech/tts_platform.h"
 
 class TtsPlatformImplAndroid : public TtsPlatformImpl {
  public:
   // TtsPlatformImpl implementation.
-  virtual bool PlatformImplAvailable() override;
-  virtual bool Speak(
-      int utterance_id,
-      const std::string& utterance,
-      const std::string& lang,
-      const VoiceData& voice,
-      const UtteranceContinuousParameters& params) override;
-  virtual bool StopSpeaking() override;
-  virtual void Pause() override;
-  virtual void Resume() override;
-  virtual bool IsSpeaking() override;
-  virtual void GetVoices(std::vector<VoiceData>* out_voices) override;
+  bool PlatformImplAvailable() override;
+  bool Speak(int utterance_id,
+             const std::string& utterance,
+             const std::string& lang,
+             const VoiceData& voice,
+             const UtteranceContinuousParameters& params) override;
+  bool StopSpeaking() override;
+  void Pause() override;
+  void Resume() override;
+  bool IsSpeaking() override;
+  void GetVoices(std::vector<VoiceData>* out_voices) override;
 
   // Methods called from Java via JNI.
   void VoicesChanged(JNIEnv* env, jobject obj);
   void OnEndEvent(JNIEnv* env, jobject obj, jint utterance_id);
   void OnErrorEvent(JNIEnv* env, jobject obj, jint utterance_id);
   void OnStartEvent(JNIEnv* env, jobject obj, jint utterance_id);
 
   // Static functions.
   static TtsPlatformImplAndroid* GetInstance();
   static bool Register(JNIEnv* env);
 
  private:
   friend struct DefaultSingletonTraits<TtsPlatformImplAndroid>;
 
   TtsPlatformImplAndroid();
-  virtual ~TtsPlatformImplAndroid();
+  ~TtsPlatformImplAndroid() override;
 
   void SendFinalTtsEvent(
       int utterance_id, TtsEventType event_type, int char_index);
 
   base::android::ScopedJavaGlobalRef<jobject> java_ref_;
   int utterance_id_;
   std::string utterance_;
 
   DISALLOW_COPY_AND_ASSIGN(TtsPlatformImplAndroid);
 };
 
 #endif  // CHROME_BROWSER_SPEECH_TTS_ANDROID_H_