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

tests/standalone/io/raw_secure_server_socket_test.dart

Index: tests/standalone/io/raw_secure_server_socket_test.dart
diff --git a/tests/standalone/io/raw_secure_server_socket_test.dart b/tests/standalone/io/raw_secure_server_socket_test.dart
index 5756e11b701a6142b65f2a992da0d51dd9826677..16babdebb97dc593c5e11f18f2fdbd399b97593b 100644
--- a/tests/standalone/io/raw_secure_server_socket_test.dart
+++ b/tests/standalone/io/raw_secure_server_socket_test.dart
@@ -87,7 +87,8 @@ void testSimpleConnectFail(String certificate, bool cancelOnError) {
         Expect.fail("No client connection expected.");
       })
       .catchError((error) {
-        Expect.isTrue(error is HandshakeException);
+        Expect.isTrue(error is SocketException ||
+                      error is HandshakeException);
       });
     server.listen((serverEnd) {
       Expect.fail("No server connection expected.");