Standardize usage of virtual/override/final in components/

components/gcm_driver/gcm_client_impl.h

Index: components/gcm_driver/gcm_client_impl.h
diff --git a/components/gcm_driver/gcm_client_impl.h b/components/gcm_driver/gcm_client_impl.h
index 6abe14966ed72e03ecb1e862d8f26e072fdda500..a20cb12c0794dfb78b98832da4281658195bf27f 100644
--- a/components/gcm_driver/gcm_client_impl.h
+++ b/components/gcm_driver/gcm_client_impl.h
@@ -80,10 +80,10 @@ class GCMClientImpl
       public ConnectionFactory::ConnectionListener {
  public:
   explicit GCMClientImpl(scoped_ptr<GCMInternalsBuilder> internals_builder);
-  virtual ~GCMClientImpl();
+  ~GCMClientImpl() override;
 
   // GCMClient implementation.
-  virtual void Initialize(
+  void Initialize(
       const ChromeBuildInfo& chrome_build_info,
       const base::FilePath& store_path,
       const scoped_refptr<base::SequencedTaskRunner>& blocking_task_runner,
@@ -91,31 +91,30 @@ class GCMClientImpl
           url_request_context_getter,
       scoped_ptr<Encryptor> encryptor,
       GCMClient::Delegate* delegate) override;
-  virtual void Start() override;
-  virtual void Stop() override;
-  virtual void CheckOut() override;
-  virtual void Register(const std::string& app_id,
-                        const std::vector<std::string>& sender_ids) override;
-  virtual void Unregister(const std::string& app_id) override;
-  virtual void Send(const std::string& app_id,
-                    const std::string& receiver_id,
-                    const OutgoingMessage& message) override;
-  virtual void SetRecording(bool recording) override;
-  virtual void ClearActivityLogs() override;
-  virtual GCMStatistics GetStatistics() const override;
-  virtual void SetAccountTokens(
+  void Start() override;
+  void Stop() override;
+  void CheckOut() override;
+  void Register(const std::string& app_id,
+                const std::vector<std::string>& sender_ids) override;
+  void Unregister(const std::string& app_id) override;
+  void Send(const std::string& app_id,
+            const std::string& receiver_id,
+            const OutgoingMessage& message) override;
+  void SetRecording(bool recording) override;
+  void ClearActivityLogs() override;
+  GCMStatistics GetStatistics() const override;
+  void SetAccountTokens(
       const std::vector<AccountTokenInfo>& account_tokens) override;
-  virtual void UpdateAccountMapping(
-      const AccountMapping& account_mapping) override;
-  virtual void RemoveAccountMapping(const std::string& account_id) override;
+  void UpdateAccountMapping(const AccountMapping& account_mapping) override;
+  void RemoveAccountMapping(const std::string& account_id) override;
 
   // GCMStatsRecorder::Delegate implemenation.
-  virtual void OnActivityRecorded() override;
+  void OnActivityRecorded() override;
 
   // ConnectionFactory::ConnectionListener implementation.
-  virtual void OnConnected(const GURL& current_server,
-                           const net::IPEndPoint& ip_endpoint) override;
-  virtual void OnDisconnected() override;
+  void OnConnected(const GURL& current_server,
+                   const net::IPEndPoint& ip_endpoint) override;
+  void OnDisconnected() override;
 
  private:
   // State representation of the GCMClient.