Suppress generation of JsGlobal and JsType code and use window as the default value instead of {} f…

lib/src/codegen/html_codegen.dart

 // Copyright (c) 2015, 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 dev_compiler.src.codegen.html_codegen;
 
 import 'package:html5lib/dom.dart';
 import 'package:html5lib/parser.dart' show parseFragment;
 import 'package:logging/logging.dart' show Logger;
 import 'package:path/path.dart' as path;
@@ skipping 91 matching lines @@
 }
 
 /// A script tag with a tiny mock of the core SDK. This is just used for testing
 /// some small samples.
 // TODO(sigmund,jmesserly): remove.
 Node get _miniMockSdk => parseFragment('''
 <script>
   /* placehorder for unimplemented code libraries */
   var math = Math;
   var core = { int: { parse: Number }, print: e => console.log(e) };
-  var dom = { document: document };
 </script>''');
 final _log = new Logger('dev_compiler.src.codegen.html_codegen');