Adds a method to TCPServerSocket to adopt a socket.

net/socket/tcp_socket_win.cc

Index: net/socket/tcp_socket_win.cc
diff --git a/net/socket/tcp_socket_win.cc b/net/socket/tcp_socket_win.cc
index 1ca554842c5c109fd2d20a111790e1f70daa9cb1..f96d678c6aeed7ef3b7aa8ddcd25e0f05bcbe922 100644
--- a/net/socket/tcp_socket_win.cc
+++ b/net/socket/tcp_socket_win.cc
@@ -284,7 +284,7 @@ int TCPSocketWin::Open(AddressFamily family) {
   return OK;
 }
 
-int TCPSocketWin::AdoptConnectedSocket(SOCKET socket,
+int TCPSocketWin::AdoptConnectedSocket(SocketDescriptor socket,
                                        const IPEndPoint& peer_address) {
   DCHECK(CalledOnValidThread());
   DCHECK_EQ(socket_, INVALID_SOCKET);
@@ -305,7 +305,7 @@ int TCPSocketWin::AdoptConnectedSocket(SOCKET socket,
   return OK;
 }
 
-int TCPSocketWin::AdoptListenSocket(SOCKET socket) {
+int TCPSocketWin::AdoptUnconnectedSocket(SocketDescriptor socket) {
   DCHECK(CalledOnValidThread());
   DCHECK_EQ(socket_, INVALID_SOCKET);
 
@@ -729,6 +729,13 @@ void TCPSocketWin::EndLoggingMultipleConnectAttempts(int net_error) {
   }
 }
 
+SocketDescriptor TCPSocketWin::ReleaseSocketDescriptorForTesting() {
+  SocketDescriptor socket_descriptor = socket_;
+  socket_ = INVALID_SOCKET;
+  Close();
+  return socket_descriptor;
+}
+
 int TCPSocketWin::AcceptInternal(std::unique_ptr<TCPSocketWin>* socket,
                                  IPEndPoint* address) {
   SockaddrStorage storage;