Standardize usage of virtual/override/final in mojo/

mojo/public/cpp/application/lib/service_registry.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 MOJO_PUBLIC_CPP_APPLICATION_LIB_SERVICE_REGISTRY_H_
 #define MOJO_PUBLIC_CPP_APPLICATION_LIB_SERVICE_REGISTRY_H_
 
 #include "mojo/public/cpp/application/application_connection.h"
 #include "mojo/public/interfaces/application/service_provider.mojom.h"
 
 namespace mojo {
 
 class Application;
 class ApplicationImpl;
 
 namespace internal {
 
 class ServiceConnectorBase;
 
 // A ServiceRegistry represents each half of a connection between two
 // applications, allowing customization of which services are published to the
 // other.
 class ServiceRegistry : public ServiceProvider, public ApplicationConnection {
  public:
   ServiceRegistry();
   ServiceRegistry(ApplicationImpl* application_impl,
                   const std::string& url,
                   ServiceProviderPtr service_provider);
-  virtual ~ServiceRegistry();
+  ~ServiceRegistry() override;
 
   // ApplicationConnection overrides.
-  virtual void AddServiceConnector(
-      ServiceConnectorBase* service_connector) override;
-  virtual const std::string& GetRemoteApplicationURL() override;
-  virtual ApplicationConnection* ConnectToApplication(
-      const std::string& url) override;
-  virtual ServiceProvider* GetServiceProvider() override;
+  void AddServiceConnector(ServiceConnectorBase* service_connector) override;
+  const std::string& GetRemoteApplicationURL() override;
+  ApplicationConnection* ConnectToApplication(const std::string& url) override;
+  ServiceProvider* GetServiceProvider() override;
 
   virtual void RemoveServiceConnector(ServiceConnectorBase* service_connector);
 
  private:
   // ServiceProvider method.
-  virtual void ConnectToService(const mojo::String& service_name,
-                                ScopedMessagePipeHandle client_handle) override;
+  void ConnectToService(const mojo::String& service_name,
+                        ScopedMessagePipeHandle client_handle) override;
 
   ApplicationImpl* application_impl_;
   const std::string url_;
 
  private:
   bool RemoveServiceConnectorInternal(ServiceConnectorBase* service_connector);
 
   Application* application_;
   typedef std::map<std::string, ServiceConnectorBase*>
       NameToServiceConnectorMap;
   NameToServiceConnectorMap name_to_service_connector_;
   ServiceProviderPtr remote_service_provider_;
 
   MOJO_DISALLOW_COPY_AND_ASSIGN(ServiceRegistry);
 };
 
 }  // namespace internal
 }  // namespace mojo
 
 #endif  // MOJO_PUBLIC_CPP_APPLICATION_LIB_SERVICE_REGISTRY_H_