Standardize usage of virtual/override/final in components/

components/gcm_driver/gcm_account_mapper.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_ACCOUNT_MAPPER_H_
 #define COMPONENTS_GCM_DRIVER_GCM_ACCOUNT_MAPPER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 13 matching lines @@
 class GCMDriver;
 extern const char kGCMAccountMapperAppId[];
 
 // Class for mapping signed-in GAIA accounts to the GCM Device ID.
 class GCMAccountMapper : public GCMAppHandler {
  public:
   // List of account mappings.
   typedef std::vector<AccountMapping> AccountMappings;
 
   explicit GCMAccountMapper(GCMDriver* gcm_driver);
-  virtual ~GCMAccountMapper();
+  ~GCMAccountMapper() override;
 
   void Initialize(const AccountMappings& account_mappings);
 
   // Called by AccountTracker, when a new list of account tokens is available.
   // This will cause a refresh of account mappings and sending updates to GCM.
   void SetAccountTokens(
       const std::vector<GCMClient::AccountTokenInfo>& account_tokens);
 
   // Implementation of GCMAppHandler:
-  virtual void ShutdownHandler() override;
-  virtual void OnMessage(const std::string& app_id,
-                         const GCMClient::IncomingMessage& message) override;
-  virtual void OnMessagesDeleted(const std::string& app_id) override;
-  virtual void OnSendError(
+  void ShutdownHandler() override;
+  void OnMessage(const std::string& app_id,
+                 const GCMClient::IncomingMessage& message) override;
+  void OnMessagesDeleted(const std::string& app_id) override;
+  void OnSendError(
       const std::string& app_id,
       const GCMClient::SendErrorDetails& send_error_details) override;
-  virtual void OnSendAcknowledged(const std::string& app_id,
-                                  const std::string& message_id) override;
-  virtual bool CanHandle(const std::string& app_id) const override;
+  void OnSendAcknowledged(const std::string& app_id,
+                          const std::string& message_id) override;
+  bool CanHandle(const std::string& app_id) const override;
 
  private:
   friend class GCMAccountMapperTest;
 
   typedef std::map<std::string, GCMClient::OutgoingMessage> OutgoingMessages;
 
   // Checks whether account mapper is ready to process new account tokens.
   bool IsReady();
 
   // Informs GCM of an added or refreshed account mapping.
@@ skipping 52 matching lines @@
   bool initialized_;
 
   base::WeakPtrFactory<GCMAccountMapper> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMAccountMapper);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_ACCOUNT_MAPPER_H_