Merging dart:html interfaces and implementations

lib/html/templates/html/dart2js/html_dart2js.darttemplate

Index: lib/html/templates/html/dart2js/html_dart2js.darttemplate
diff --git a/lib/html/templates/html/dart2js/html_dart2js.darttemplate b/lib/html/templates/html/dart2js/html_dart2js.darttemplate
index fe44af3b412fd42ee1ed08995066f9ea4900b5b3..865bf442b097c965aab22f4eb77325d4cad2d8e4 100644
--- a/lib/html/templates/html/dart2js/html_dart2js.darttemplate
+++ b/lib/html/templates/html/dart2js/html_dart2js.darttemplate
@@ -38,18 +38,15 @@ part '$AUXILIARY_DIR/_Lists.dart';
 
 
 LocalWindow get window => JS('LocalWindow', 'window');
-_LocalWindowImpl get _window => JS('_LocalWindowImpl', 'window');
 
 Document get document => JS('Document', 'document');
 
-_DocumentImpl get _document => JS('_DocumentImpl', 'document');
-
-Element query(String selector) => _document.query(selector);
-List<Element> queryAll(String selector) => _document.queryAll(selector);
+Element query(String selector) => document.query(selector);
+List<Element> queryAll(String selector) => document.queryAll(selector);
 
 // Workaround for tags like <cite> that lack their own Element subclass --
 // Dart issue 1990.
-class _HTMLElementImpl extends _ElementImpl native "*HTMLElement" {
+class HTMLElement extends Element native "*HTMLElement" {
 }
 
 // Support for Send/ReceivePortSync.