WebSocket: Correctly expect masked frames from clients, and send masked frames from the client.

tests/standalone/io/web_socket_protocol_processor_test.dart

Index: tests/standalone/io/web_socket_protocol_processor_test.dart
diff --git a/tests/standalone/io/web_socket_protocol_processor_test.dart b/tests/standalone/io/web_socket_protocol_processor_test.dart
index 36eeeed404c78307c37d110cc402e125b5ceba7b..54a7c129781efa6366a78401edeaec7d2867397f 100644
--- a/tests/standalone/io/web_socket_protocol_processor_test.dart
+++ b/tests/standalone/io/web_socket_protocol_processor_test.dart
@@ -8,6 +8,7 @@ import "dart:math";
 import "dart:async";
 import "dart:collection";
 import "dart:typeddata";
+import "dart:isolate";
 
 part "../../../sdk/lib/io/http.dart";
 part "../../../sdk/lib/io/buffer_list.dart";
@@ -226,7 +227,22 @@ void testFragmentedMessages() {
   Expect.equals(0, mc.closeCount);
 }
 
+void testUnmaskedMessage() {
+  var transformer = new _WebSocketProtocolTransformer(true);
+  var controller = new StreamController();
+  var port = new ReceivePort();
+  controller.stream.transform(transformer).listen((_) {}, onError: (e) {
+    port.close();
+  });
+  var message = new Uint8List(10);
+  List<int> frame = createFrame(
+      true, FRAME_OPCODE_BINARY, null, message, 0, message.length);
+  controller.add(frame);
+}
+
+
 void main() {
   testFullMessages();
   testFragmentedMessages();
+  testUnmaskedMessage();
 }