Fix 9347, always send ExternalTypedData objects as TypedData objects when

tests/standalone/typed_data_isolate_test.dart

Index: tests/standalone/typed_data_isolate_test.dart
===================================================================
--- tests/standalone/typed_data_isolate_test.dart	(revision 0)
+++ tests/standalone/typed_data_isolate_test.dart	(revision 0)
@@ -0,0 +1,32 @@
+// 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.
+//
+// Dart test program for testing typed data.
+
+// Library tag to be able to run in html test framework.
+library TypedDataIsolateTest;
+
+import 'dart:io';
+import 'dart:isolate';
+
+second() {
+ print('spawned');
+ port.receive((data, replyTo) {
+   print('got data');
+   print(data);
+   print('printed data');
+   replyTo.send('OK');
+   port.close();
+ });
+}
+
+main() {
+ new File(new Options().script).readAsBytes().then((List<int> data) {
+   spawnFunction(second).call(data).then((reply) {
+     print('got reply');
+     port.close();
+   });
+ });
+}
+