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

components/gcm_driver/gcm_driver_android.h

 // 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.
 
 #ifndef COMPONENTS_GCM_DRIVER_GCM_DRIVER_ANDROID_H
 #define COMPONENTS_GCM_DRIVER_GCM_DRIVER_ANDROID_H
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "components/gcm_driver/gcm_driver.h"
 
 namespace gcm {
 
 // GCMDriver implementation for Android, using Android GCM APIs.
 class GCMDriverAndroid : public GCMDriver {
  public:
   GCMDriverAndroid();
-  virtual ~GCMDriverAndroid();
+  ~GCMDriverAndroid() override;
 
   // Methods called from Java via JNI:
   void OnRegisterFinished(JNIEnv* env,
                           jobject obj,
                           jstring app_id,
                           jstring registration_id,
                           jboolean success);
   void OnUnregisterFinished(JNIEnv* env,
                            jobject obj,
                            jstring app_id,
                            jboolean success);
   void OnMessageReceived(JNIEnv* env,
                          jobject obj,
                          jstring app_id,
                          jstring sender_id,
                          jstring collapse_key,
                          jobjectArray data_keys_and_values);
   void OnMessagesDeleted(JNIEnv* env,
                          jobject obj,
                          jstring app_id);
 
   // Register JNI methods.
   static bool RegisterBindings(JNIEnv* env);
 
   // GCMDriver implementation:
-  virtual void OnSignedIn() override;
-  virtual void OnSignedOut() override;
-  virtual void Enable() override;
-  virtual void AddConnectionObserver(GCMConnectionObserver* observer) override;
-  virtual void RemoveConnectionObserver(
-      GCMConnectionObserver* observer) override;
-  virtual void Disable() override;
-  virtual GCMClient* GetGCMClientForTesting() const override;
-  virtual bool IsStarted() const override;
-  virtual bool IsConnected() const override;
-  virtual void GetGCMStatistics(const GetGCMStatisticsCallback& callback,
-                                bool clear_logs) override;
-  virtual void SetGCMRecording(const GetGCMStatisticsCallback& callback,
-                               bool recording) override;
-  virtual void SetAccountTokens(
+  void OnSignedIn() override;
+  void OnSignedOut() override;
+  void Enable() override;
+  void AddConnectionObserver(GCMConnectionObserver* observer) override;
+  void RemoveConnectionObserver(GCMConnectionObserver* observer) override;
+  void Disable() override;
+  GCMClient* GetGCMClientForTesting() const override;
+  bool IsStarted() const override;
+  bool IsConnected() const override;
+  void GetGCMStatistics(const GetGCMStatisticsCallback& callback,
+                        bool clear_logs) override;
+  void SetGCMRecording(const GetGCMStatisticsCallback& callback,
+                       bool recording) override;
+  void SetAccountTokens(
       const std::vector<GCMClient::AccountTokenInfo>& account_tokens) override;
-  virtual void UpdateAccountMapping(
-      const AccountMapping& account_mapping) override;
-  virtual void RemoveAccountMapping(const std::string& account_id) override;
-  virtual base::Time GetLastTokenFetchTime() override;
-  virtual void SetLastTokenFetchTime(const base::Time& time) override;
-  virtual void WakeFromSuspendForHeartbeat(bool wake) override;
+  void UpdateAccountMapping(const AccountMapping& account_mapping) override;
+  void RemoveAccountMapping(const std::string& account_id) override;
+  base::Time GetLastTokenFetchTime() override;
+  void SetLastTokenFetchTime(const base::Time& time) override;
+  void WakeFromSuspendForHeartbeat(bool wake) override;
 
  protected:
   // GCMDriver implementation:
-  virtual GCMClient::Result EnsureStarted(
-      GCMClient::StartMode start_mode) override;
-  virtual void RegisterImpl(
-      const std::string& app_id,
-      const std::vector<std::string>& sender_ids) override;
-  virtual void UnregisterImpl(const std::string& app_id) override;
-  virtual void SendImpl(const std::string& app_id,
-                        const std::string& receiver_id,
-                        const GCMClient::OutgoingMessage& message) override;
+  GCMClient::Result EnsureStarted(GCMClient::StartMode start_mode) override;
+  void RegisterImpl(const std::string& app_id,
+                    const std::vector<std::string>& sender_ids) override;
+  void UnregisterImpl(const std::string& app_id) override;
+  void SendImpl(const std::string& app_id,
+                const std::string& receiver_id,
+                const GCMClient::OutgoingMessage& message) override;
 
  private:
   base::android::ScopedJavaGlobalRef<jobject> java_ref_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMDriverAndroid);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_DRIVER_ANDROID_H