Fix error where upgrading a closed socket to secure will hang.

sdk/lib/io/secure_socket.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.io;
 
 /**
  * A high-level class for communicating securely over a TCP socket, using
  * TLS and SSL. The [SecureSocket] exposes both a [Stream] and an
  * [IOSink] interface, making it ideal for using together with
@@ skipping 540 matching lines @@
       // create a new one.
       _socketSubscription = _socket.listen(_eventDispatcher,
                                            onError: _reportError,
                                            onDone: _doneHandler);
     } else {
       if (_socketSubscription.isPaused) {
         _socket.close();
         throw new ArgumentError(
             "Subscription passed to TLS upgrade is paused");
       }
+      // If we are upgrading a socket that is already closed for read,
+      // report an error as if we received READ_CLOSED during the handshake.
+      if (_socket._socket.closedReadEventSent) {
+        _eventDispatcher(RawSocketEvent.READ_CLOSED);
+      }
       _socketSubscription
           ..onData(_eventDispatcher)
           ..onError(_reportError)
           ..onDone(_doneHandler);
     }
     try {
       _secureFilter.connect(address.host,
                             (address as dynamic)._in_addr,
                             port,
                             is_server,
@@ skipping 852 matching lines @@
 /**
  * An exception that happens in the handshake phase of establishing
  * a secure network connection, when looking up or verifying a
  * certificate.
  */
 class CertificateException extends TlsException {
   const CertificateException([String message = "",
                             OSError osError = null])
      : super._("CertificateException", message, osError);
 }