Fixes ABI bug in MIPS.

samples/sample_extension/sample_asynchronous_extension_no_autoscope.dart

Index: samples/sample_extension/sample_asynchronous_extension_no_autoscope.dart
===================================================================
--- samples/sample_extension/sample_asynchronous_extension_no_autoscope.dart	(revision 0)
+++ samples/sample_extension/sample_asynchronous_extension_no_autoscope.dart	(revision 0)
@@ -0,0 +1,42 @@
+// Copyright (c) 2012, 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.
+
+library sample_asynchronous_extension_no_autoscope;
+
+import 'dart:async';
+import 'dart:isolate';
+import 'dart-ext:sample_extension_no_autoscope';
+
+// A class caches the native port used to call an asynchronous extension.
+class RandomArray {
+  static SendPort _port;
+
+  Future<List<int> > randomArray(int seed, int length) {
+    var completer = new Completer();
+    var replyPort = new RawReceivePort();
+    var args = new List(3);
+    args[0] = seed;
+    args[1] = length;
+    args[2] = replyPort.sendPort;
+    _servicePort.send(args);
+    replyPort.handler = (result) {
+      replyPort.close();
+      if (result != null) {
+        completer.complete(result);
+      } else {
+        completer.completeError(new Exception("Random array creation failed"));
+      }
+    };
+    return completer.future;
+  }
+
+  SendPort get _servicePort {
+    if (_port == null) {
+      _port = _newServicePort();
+    }
+    return _port;
+  }
+
+  SendPort _newServicePort() native "RandomArray_ServicePort";
+}