Standardize usage of virtual/override/final in chrome/browser/apps/

chrome/browser/apps/app_shim/unix_domain_socket_acceptor.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 CHROME_BROWSER_APPS_APP_SHIM_UNIX_DOMAIN_SOCKET_ACCEPTOR_H_
 #define CHROME_BROWSER_APPS_APP_SHIM_UNIX_DOMAIN_SOCKET_ACCEPTOR_H_
 
 #include "base/files/file_path.h"
 #include "base/message_loop/message_loop.h"
 #include "ipc/ipc_channel_handle.h"
@@ skipping 12 matching lines @@
     // responsibility to create an IPC::Channel for the handle, or else close
     // the file descriptor contained therein.
     virtual void OnClientConnected(const IPC::ChannelHandle& handle) = 0;
 
     // Called when an error occurs and the channel is closed.
     virtual void OnListenError() = 0;
   };
 
   UnixDomainSocketAcceptor(const base::FilePath& path, Delegate* delegate);
 
-  virtual ~UnixDomainSocketAcceptor();
+  ~UnixDomainSocketAcceptor() override;
 
   // Call this to start listening on the socket.
   bool Listen();
 
   // Close and unlink the socket, and stop accepting connections.
   void Close();
 
  private:
   bool CreateSocket();
-  virtual void OnFileCanReadWithoutBlocking(int fd) override;
-  virtual void OnFileCanWriteWithoutBlocking(int fd) override;
+  void OnFileCanReadWithoutBlocking(int fd) override;
+  void OnFileCanWriteWithoutBlocking(int fd) override;
 
   base::MessageLoopForIO::FileDescriptorWatcher
       server_listen_connection_watcher_;
   base::FilePath path_;
   Delegate* delegate_;
   int listen_fd_;
 
   DISALLOW_COPY_AND_ASSIGN(UnixDomainSocketAcceptor);
 };
 
 }  // namespace apps
 
 #endif  // CHROME_BROWSER_APPS_APP_SHIM_UNIX_DOMAIN_SOCKET_ACCEPTOR_H_