Revert "remove old code"

This reverts commit aeea23be44.

src/utils/adopter.js

@@ -41,6 +41,9 @@ export function makeInstance (element, isHTML = false) {
   return element
 }
 
+// export function nodeOrNew (name, node) {
+//   return node instanceof globals.window.Node ? node : create(name)
+// }
 export function nodeOrNew (name, node) {
   return (node && node.ownerDocument && node instanceof node.ownerDocument.defaultView.Node) ? node : create(name)
 }