Remove streamSpawnUri and mangler.

tests/isolate/global_error_handler_stream2_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.
+
+import 'dart:async';
+import 'dart:isolate';
+
+runTest() {
+  IsolateSink mainIsolate;
+  stream.listen((msg) {
+    mainIsolate = msg;
+    throw new RuntimeError("ignore exception");
+  }, onDone: () {
+    mainIsolate.add("received done");
+    mainIsolate.close();
+  });
+}
+
+bool globalErrorHandler(IsolateUnhandledException e) {
+  var source = e.source;
+  if (source is AsyncError) {
+    source = source.error;
+  }
+  return source is RuntimeError && source.message == "ignore exception";
+}
+
+main() {
+  // Make sure this test doesn't last longer than 2 seconds.
+  var timer = new Timer(const Duration(seconds: 2), () { throw "failed"; });
+
+  var box = new MessageBox();
+  IsolateSink otherIsolate = streamSpawnFunction(runTest, globalErrorHandler);
+  otherIsolate.add(box.sink);
+  otherIsolate.close();
+  box.stream.single.then((msg) {
+    Expect.equals("received done", msg);
+    timer.cancel();
+  });
+}