Merging dart:html interfaces and implementations

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

Index: sdk/lib/html/templates/html/dart2js/html_dart2js.darttemplate
diff --git a/sdk/lib/html/templates/html/dart2js/html_dart2js.darttemplate b/sdk/lib/html/templates/html/dart2js/html_dart2js.darttemplate
index d99ed226ad0598e6d4b3313338dbcc94da4a3a9f..cfd1e673b651f38a5aca98305ad624dc31d6d6cf 100644
--- a/sdk/lib/html/templates/html/dart2js/html_dart2js.darttemplate
+++ b/sdk/lib/html/templates/html/dart2js/html_dart2js.darttemplate
@@ -39,18 +39,15 @@ 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.