Reland of Allow the localhost IP address even if it does not match the tcp port address

webrtc/base/virtualsocketserver.h

Index: webrtc/base/virtualsocketserver.h
diff --git a/webrtc/base/virtualsocketserver.h b/webrtc/base/virtualsocketserver.h
index a83be28522f277ea2a4e6232258bf65288bfbe6f..897ba9e5ebc3472e5de1d9a1ac11f1cc68708bf2 100644
--- a/webrtc/base/virtualsocketserver.h
+++ b/webrtc/base/virtualsocketserver.h
@@ -121,6 +121,9 @@
   // its own OnClose invoked.
   bool CloseTcpConnections(const SocketAddress& addr_local,
                            const SocketAddress& addr_remote);
+
+  // For testing purpose only. Fired when a client socket is created.
+  sigslot::signal1<VirtualSocket*> SignalSocketCreated;
 
  protected:
   // Returns a new IP not used before in this network.