Create generated tests inside the build directory

tests/html/dromaeo_smoke_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.
 
 library dromaeo;
 import '../../pkg/unittest/lib/unittest.dart';
 import '../../pkg/unittest/lib/html_config.dart';
 import '../../samples/third_party/dromaeo/Dromaeo.dart' as originalTest;
 import 'dart:html';
 import 'dart:async';
 
 /** A variant of the Dromaeo test shoehorned into a unit test. */
 void main() {
   var combo = '?dartANDhtmlANDnothing';
   if (!window.location.search.toString().contains(combo)) {
     if (window.location.href.toString().indexOf("?") == -1) {
       window.location.href = '${window.location.href}${combo}';
     } else {
       window.location.href = '${window.location.href.toString().substring(0,
           window.location.href.toString().indexOf("?"))}${combo}';
     }
   }
 
   useHtmlConfiguration();
 
   var scriptSrc = new ScriptElement();
-  scriptSrc.src = '../../../../pkg/browser/lib/dart.js';
+  scriptSrc.src = '/root_dart/pkg/browser/lib/dart.js';
   document.head.children.add(scriptSrc);
   document.body.innerHtml = '''${document.body.innerHtml}
   <div id="main">
     <h1 id="overview" class="test"><span>Performance Tests</span>
     <input type="button" id="pause" class="pause" value="Loading..."/>
     <div class="bar">
       <div id="timebar" style="width:25%;">
         <span class="left">Est.&nbsp;Time:&nbsp;<strong id="left">0:00</strong>
         </span>
       </div>
     </div>
     <ul id="tests">
       <li><a href="?dom">Smoke Tests</a></li>
     </ul>
   </div>''';
 
   bool isDone = false;
   originalTest.main();
 
   test('dromaeo runs', () {
     new Timer.repeating(new Duration(milliseconds: 500),
                         expectAsyncUntil1((timer) {
       if (document.query('.alldone') != null) {
         timer.cancel();
         isDone = true;
       }
     }, () => isDone));
   });
 }