Standardize usage of virtual/override/final in extensions/

extensions/browser/api/socket/socket.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 EXTENSIONS_BROWSER_API_SOCKET_SOCKET_H_
 #define EXTENSIONS_BROWSER_API_SOCKET_SOCKET_H_
 
 #include <queue>
 #include <string>
 #include <utility>
@@ skipping 23 matching lines @@
     RecvFromCompletionCallback;
 typedef base::Callback<void(int, net::TCPClientSocket*)>
     AcceptCompletionCallback;
 
 // A Socket wraps a low-level socket and includes housekeeping information that
 // we need to manage it in the context of an extension.
 class Socket : public ApiResource {
  public:
   enum SocketType { TYPE_TCP, TYPE_UDP, TYPE_TLS };
 
-  virtual ~Socket();
+  ~Socket() override;
 
   // The hostname of the remote host that this socket is connected to.  This
   // may be the empty string if the client does not intend to ever upgrade the
   // socket to TLS, and thusly has not invoked set_hostname().
   const std::string& hostname() const { return hostname_; }
 
   // Set the hostname of the remote host that this socket is connected to.
   // Note: This may be an IP literal. In the case of IDNs, this should be a
   // series of U-LABELs (UTF-8), not A-LABELs. IP literals for IPv6 will be
   // unbracketed.
@@ skipping 77 matching lines @@
     CompletionCallback callback;
     int bytes_written;
   };
   std::queue<WriteRequest> write_queue_;
   scoped_refptr<net::IOBuffer> io_buffer_write_;
 };
 
 }  //  namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_SOCKET_SOCKET_H_