Roll Dart forward.

mojo/dart/embedder/builtin.dart

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 library mojo_builtin;
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:mojo.internal';
 
@@ skipping 19 matching lines @@
 
 
 Uri _uriBase() {
   return _entryPointScript.resolve('.');
 }
 
 _getUriBaseClosure() => _uriBase;
 
 _setupHooks() {
   VMLibraryHooks.eventHandlerSendData = MojoHandleWatcher.timer;
+  VMLibraryHooks.timerMillisecondClock = MojoCoreNatives.timerMillisecondClock;
 }
 
 String _rawCwd;
 Uri _cachedWorkingDirectory;
 Uri get _workingDirectory {
   if (_cachedWorkingDirectory != null) {
     return _cachedWorkingDirectory;
   }
   _rawCwd = _enforceTrailingSlash(_rawCwd);
   _cachedWorkingDirectory = new Uri(scheme: 'file', path: _rawCwd);
@@ skipping 60 matching lines @@
   _rawCwd = cwd;
 }
 
 _setPackageRoot(String packageRoot) {
   _rawPackageRoot = packageRoot;
 }
 
 _resolveScriptUri(String scriptName) {
   _rawScriptName = scriptName;
 }