Standardize usage of virtual/override/final specifiers.

chrome/browser/speech/tts_linux.cc

 // Copyright (c) 2012 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 <math.h>
 
 #include <map>
 
 #include "base/command_line.h"
 #include "base/debug/leak_annotations.h"
@@ skipping 15 matching lines @@
 
 struct SPDChromeVoice {
   std::string name;
   std::string module;
 };
 
 }  // namespace
 
 class TtsPlatformImplLinux : public TtsPlatformImpl {
  public:
-  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;
 
   void OnSpeechEvent(SPDNotificationType type);
 
   // Get the single instance of this class.
   static TtsPlatformImplLinux* GetInstance();
 
  private:
   TtsPlatformImplLinux();
-  virtual ~TtsPlatformImplLinux();
+  ~TtsPlatformImplLinux() override;
 
   // Initiate the connection with the speech dispatcher.
   void Initialize();
 
   // Resets the connection with speech dispatcher.
   void Reset();
 
   static void NotificationCallback(size_t msg_id,
                                    size_t client_id,
                                    SPDNotificationType type);
@@ skipping 276 matching lines @@
 // static
 TtsPlatformImplLinux* TtsPlatformImplLinux::GetInstance() {
   return Singleton<TtsPlatformImplLinux,
                    LeakySingletonTraits<TtsPlatformImplLinux> >::get();
 }
 
 // static
 TtsPlatformImpl* TtsPlatformImpl::GetInstance() {
   return TtsPlatformImplLinux::GetInstance();
 }