Decouple DevTools from socket implementation.

net/base/tcp_listen_socket.h

Index: net/base/tcp_listen_socket.h
diff --git a/net/base/tcp_listen_socket.h b/net/base/tcp_listen_socket.h
index fed1df36689d7b2f67a8728a4af981b7ff3a614b..5250d3a786173ac8f97ff2acb29851c71f3cb9b1 100644
--- a/net/base/tcp_listen_socket.h
+++ b/net/base/tcp_listen_socket.h
@@ -39,6 +39,23 @@ class NET_EXPORT TCPListenSocket : public StreamListenSocket {
   DISALLOW_COPY_AND_ASSIGN(TCPListenSocket);
 };
 
+// Factory that can be used to instantiate TCPListenSocket.
+class TCPListenSocketFactory : public StreamListenSocketFactory {
+ public:
+  TCPListenSocketFactory(const std::string& ip, int port);
+  virtual ~TCPListenSocketFactory();
+
+  // StreamListenSocketFactory overrides.
+  virtual scoped_refptr<StreamListenSocket> CreateAndListen(
+      StreamListenSocket::Delegate* delegate) OVERRIDE;
+
+ private:
+  const std::string ip_;
+  const int port_;
+
+  DISALLOW_COPY_AND_ASSIGN(TCPListenSocketFactory);
+};
+
 }  // namespace net
 
 #endif  // NET_BASE_TCP_LISTEN_SOCKET_H_