dart:io | Fix handling of exceptions from onBadCertificate callback.

tests/standalone/io/secure_socket_bad_certificate_test.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.
-//
-// VMOptions=
-// VMOptions=--short_socket_read
-// VMOptions=--short_socket_write
-// VMOptions=--short_socket_write --short_socket_read
-// The --short_socket_write option does not work with external server
-// www.google.dk.  Add this to the test when we have secure server sockets.
-// See TODO below.
-
-import "package:expect/expect.dart";
-import "dart:async";
-import "dart:isolate";
-import "dart:io";
-
-void main() {
-  ReceivePort keepAlive = new ReceivePort();
-  SecureSocket.initialize(useBuiltinRoots: false);
-  testCertificateCallback(host: "www.google.com",
-                          acceptCertificate: false)
-    .then((_) =>
-      testCertificateCallback(host: "www.google.com",
-                              acceptCertificate: true))
-    .then((_) =>
-      keepAlive.close());
-}
-
-Future testCertificateCallback({String host, bool acceptCertificate}) {
-  var x = 7;
-  Expect.throws(() => SecureSocket.connect(host, 443, onBadCertificate: x),
-                (e) => e is ArgumentError || e is TypeError);
-
-  bool badCertificateCallback(X509Certificate certificate) {
-    Expect.isTrue(certificate.subject.contains("O=Google Inc"));
-    Expect.isTrue(certificate.startValidity.isBefore(new DateTime.now()));
-    Expect.isTrue(certificate.endValidity.isAfter(new DateTime.now()));
-    return acceptCertificate;
-  };
-
-  return SecureSocket.connect(host,
-                              443,
-                              onBadCertificate: badCertificateCallback)
-      .then((socket) {
-        Expect.isTrue(acceptCertificate);
-        socket.write("GET / HTTP/1.0\r\nHost: $host\r\n\r\n");
-        socket.close();
-        return socket.fold(<int>[], (message, data)  => message..addAll(data))
-            .then((message) {
-              String received = new String.fromCharCodes(message);
-              Expect.isTrue(received.startsWith('HTTP/1.0 '));
-            });
-      }).catchError((e) {
-        if (e is HandshakeException) {
-          Expect.isFalse(acceptCertificate);
-        } else {
-          Expect.isTrue(e is SocketException);
-        }
-      });
-}