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

cloud_print/service/win/setup_listener.h

 // Copyright 2013 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 CLOUD_PRINT_SERVICE_SETUP_LISTENER_H_
 #define CLOUD_PRINT_SERVICE_SETUP_LISTENER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 18 matching lines @@
 class SetupListener : public IPC::Listener {
  public:
   static const char kXpsAvailableJsonValueName[];
   static const char kChromePathJsonValueName[];
   static const char kPrintersJsonValueName[];
   static const char kUserDataDirJsonValueName[];
   static const char kUserNameJsonValueName[];
   static const wchar_t kSetupPipeName[];
 
   explicit SetupListener(const base::string16& user);
-  virtual ~SetupListener();
+  ~SetupListener() override;
 
-  virtual bool OnMessageReceived(const IPC::Message& msg) override;
-  virtual void OnChannelError() override;
+  bool OnMessageReceived(const IPC::Message& msg) override;
+  void OnChannelError() override;
 
   bool WaitResponce(const base::TimeDelta& delta);
 
   const base::FilePath& chrome_path() const {
     return chrome_path_;
   }
 
   const base::FilePath& user_data_dir() const {
     return user_data_dir_;
   }
@@ skipping 21 matching lines @@
   bool is_xps_available_;
   bool succeded_;
 
   scoped_ptr<base::WaitableEvent> done_event_;
   scoped_ptr<base::Thread> ipc_thread_;
   scoped_ptr<IPC::Channel> channel_;
 };
 
 #endif  // CLOUD_PRINT_SERVICE_SETUP_LISTENER_H_