Added timeout parameter to RawSocket and Socket connect, which allows for the specification of a ma…

tests/standalone/io/socket_test.dart

Index: tests/standalone/io/socket_test.dart
diff --git a/tests/standalone/io/socket_test.dart b/tests/standalone/io/socket_test.dart
index 314e1113924477381ea1b2f1821523e2a052ba85..40d1fd6bc7a8bc09bd1802b60228e0260fd373a9 100644
--- a/tests/standalone/io/socket_test.dart
+++ b/tests/standalone/io/socket_test.dart
@@ -197,6 +197,17 @@ void testConnectStreamDataCloseCancel(bool useDestroy) {
   });
 }
 
+void testConnectTimeout() {
+  Duration timeout = new Duration(milliseconds: 20);
+  Socket.connect("8.8.8.7", 80, timeout: timeout).then((socket) {
+    Expect.fail("Unexpected connection made.");
+  }).catchError((e) {
+    if (!(e is SocketException)) {
+      Expect.fail("Caught unexpected exception: ${e}");
+    }
+  });
+}
+
 main() {
   testArguments();
   testSimpleBind();
@@ -209,4 +220,5 @@ main() {
   testConnectStreamDataClose(false);
   testConnectStreamDataCloseCancel(true);
   testConnectStreamDataCloseCancel(false);
+  testConnectTimeout();
 }