[chromedriver] Use NodeType enum for consistency.

chrome/test/chromedriver/js/call_function.js

Index: chrome/test/chromedriver/js/call_function.js
diff --git a/chrome/test/chromedriver/js/call_function.js b/chrome/test/chromedriver/js/call_function.js
index d79e70d8a8e578788dbf16ddea6363fc5d369bb1..b6e9560b82895aa81a4bceb6ac02497d11363d35 100644
--- a/chrome/test/chromedriver/js/call_function.js
+++ b/chrome/test/chromedriver/js/call_function.js
@@ -261,7 +261,7 @@ function wrap(value) {
   // typeof(frames[0].document.body) == 'object'.
   if ((typeof(value) == 'object' && value != null) ||
       (typeof(value) == 'function' && value.nodeName &&
-       value.nodeType == Node.ELEMENT_NODE)) {
+       value.nodeType == NodeType.ELEMENT)) {
     var nodeType = value['nodeType'];
     if (nodeType == NodeType.ELEMENT || nodeType == NodeType.DOCUMENT
         || (SHADOW_DOM_ENABLED && value instanceof ShadowRoot)) {