Revert all html warning changes.

tools/dom/scripts/systemnative.py

 #!/usr/bin/python
 # 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.
 
 """This module provides shared functionality for the systems to generate
 native binding from the IDL database."""
 
 import emitter
 import os
@@ skipping 1364 matching lines @@
     e.Emit('    { "_DOMWindowCrossFrame", DartHtmlLibraryId, -1, false, false, true },\n');
     e.Emit('    { "DateTime", DartCoreLibraryId, -1, false, false, false },\n');
     e.Emit('    { "JsObject", DartJsLibraryId, -1, false, false, false },\n');
     e.Emit('    { "JsFunction", DartJsLibraryId, _JsObjectClassId, false, false, false },\n');
     e.Emit('    { "JsArray", DartJsLibraryId, _JsObjectClassId, false, false, false },\n');
     e.Emit('    // New types that are not auto-generated should be added here.\n');
     e.Emit('\n');
     is_node_test = lambda interface: interface.id == 'Node'
     is_active_test = lambda interface: 'ActiveDOMObject' in interface.ext_attrs
     is_event_target_test = lambda interface: 'EventTarget' in interface.ext_attrs
-
     def TypeCheckHelper(test):
       return 'true' if any(map(test, database.Hierarchy(interface))) else 'false'
     for interface in database.GetInterfaces():
       e.Emit("    {")
       type_info = type_registry.TypeInfo(interface.id)
       type_info.native_type().replace('<', '_').replace('>', '_'),
       e.Emit(' "%s",' % type_info.implementation_name())
       e.Emit(' Dart%sLibraryId,' % renamer.GetLibraryId(interface))
       if interface.parents:
         supertype = interface.parents[0].type.id
         e.Emit(' %sClassId,\n' % supertype)
       else:
         e.Emit(' -1,')
       e.Emit(" %s," % TypeCheckHelper(is_node_test))
       e.Emit(" %s," % TypeCheckHelper(is_active_test))
       e.Emit(" %s," % TypeCheckHelper(is_event_target_test))
       e.Emit(" },\n")
     e.Emit("};\n");
     e.Emit('\n');
     e.Emit('} // namespace WebCore\n');
 
 def _IsOptionalStringArgumentInInitEventMethod(interface, operation, argument):
   return (
       interface.id.endswith('Event') and
       operation.id.startswith('init') and
       argument.ext_attrs.get('Default') == 'Undefined' and
       argument.type.id == 'DOMString')