[MD Extensions] Update polymer properties ordering

chrome/browser/resources/md_extensions/item.js

Index: chrome/browser/resources/md_extensions/item.js
diff --git a/chrome/browser/resources/md_extensions/item.js b/chrome/browser/resources/md_extensions/item.js
index d2910d97c04abd7ab8cb937af58d532a1a0a1700..fe0b1f4cd8c7014c219e06101758c769afe659cb 100644
--- a/chrome/browser/resources/md_extensions/item.js
+++ b/chrome/browser/resources/md_extensions/item.js
@@ -62,6 +62,8 @@ cr.define('extensions', function() {
   var Item = Polymer({
     is: 'extensions-item',
 
+    behaviors: [I18nBehavior],
+
     properties: {
       // The item's delegate, or null.
       delegate: {
@@ -88,10 +90,6 @@ cr.define('extensions', function() {
       },
     },
 
-    behaviors: [
-      I18nBehavior,
-    ],
-
     observers: [
       'observeIdVisibility_(inDevMode, showingDetails_, data.id)',
     ],