Restore workaround for old Chrome bug that also affects Safari and in some cases Firefox, fix test …

tools/dom/templates/html/impl/impl_Element.darttemplate

Index: tools/dom/templates/html/impl/impl_Element.darttemplate
diff --git a/tools/dom/templates/html/impl/impl_Element.darttemplate b/tools/dom/templates/html/impl/impl_Element.darttemplate
index fdcd296d131a1b77b08238b1058c457ae9b4c9cd..6f5ae1b2cb8c68f4074eba8b89d93f64ab0d8b46 100644
--- a/tools/dom/templates/html/impl/impl_Element.darttemplate
+++ b/tools/dom/templates/html/impl/impl_Element.darttemplate
@@ -1328,6 +1328,12 @@ $endif
     if (_parseDocument == null) {
       _parseDocument = document.implementation.createHtmlDocument('');
       _parseRange = _parseDocument.createRange();
+	
+      // Workaround for Safari bug. Was also previously Chrome bug 229142
+      // - URIs are not resolved in new doc.	
+      var base = _parseDocument.createElement('base');	
+      base.href = document.baseUri;	
+      _parseDocument.head.append(base);
     }
     var contextElement;
     if (this is BodyElement) {