Reset server_socket_ when listen fails in extensions::TCPSocket.

extensions/browser/api/socket/tcp_socket.cc

Index: extensions/browser/api/socket/tcp_socket.cc
diff --git a/extensions/browser/api/socket/tcp_socket.cc b/extensions/browser/api/socket/tcp_socket.cc
index 8d5257b45c3007ba9e7c0bb2bde5dc6efb2792f6..79558d4f94c567b09481c87bb52c0a68aa024e6f 100644
--- a/extensions/browser/api/socket/tcp_socket.cc
+++ b/extensions/browser/api/socket/tcp_socket.cc
@@ -196,8 +196,10 @@ int TCPSocket::Listen(const std::string& address,
   }
 
   int result = server_socket_->ListenWithAddressAndPort(address, port, backlog);
-  if (result)
+  if (result) {
+    server_socket_.reset();
     *error_msg = kSocketListenError;
+  }
   return result;
 }