Testing & supporting new HTMLTemplateElement

sdk/lib/html/dart2js/html_dart2js.dart

Index: sdk/lib/html/dart2js/html_dart2js.dart
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 9729c5106bfca25850f2cc0b02a4a041e990e494..7733a8aef5892e404e944c1bb968970c89e05f3c 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -18417,8 +18417,17 @@ class TableSectionElement extends Element native "HTMLTableSectionElement" {
 
 @DocsEditable
 @DomName('HTMLTemplateElement')
+@SupportedBrowser(SupportedBrowser.CHROME)
+@Experimental
 class TemplateElement extends Element native "HTMLTemplateElement" {
 
+  @DomName('HTMLTemplateElement.HTMLTemplateElement')
+  @DocsEditable
+  factory TemplateElement() => document.$dom_createElement("template");
+
+  /// Checks if this type is supported on the current platform.
+  static bool get supported => Element.isTagSupported('template');
+
   @DomName('HTMLTemplateElement.content')
   @DocsEditable
   final DocumentFragment content;