[MD Extensions] Update polymer properties ordering

chrome/browser/resources/md_extensions/item.js

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Closure compiler won't let this be declared inside cr.define().
 /** @enum {string} */
 var SourceType = {
   WEBSTORE: 'webstore',
   POLICY: 'policy',
   SIDELOADED: 'sideloaded',
@@ skipping 44 matching lines @@
      */
     inspectItemView: assertNotReached,
 
     /** @param {string} id */
     repairItem: assertNotReached,
   };
 
   var Item = Polymer({
     is: 'extensions-item',
 
+    behaviors: [I18nBehavior],
+
     properties: {
       // The item's delegate, or null.
       delegate: {
         type: Object,
       },
 
       // Whether or not dev mode is enabled.
       inDevMode: {
         type: Boolean,
         value: false,
       },
 
-      // Whether or not the expanded view of the item is shown.
-      showingDetails_: {
-        type: Boolean,
-        value: false,
-      },
-
       // The underlying ExtensionInfo itself. Public for use in declarative
       // bindings.
       /** @type {chrome.developerPrivate.ExtensionInfo} */
       data: {
         type: Object,
       },
+
+      // Whether or not the expanded view of the item is shown.
+      /** @private */
+      showingDetails_: {
+        type: Boolean,
+        value: false,
+      },
     },
 
-    behaviors: [
-      I18nBehavior,
-    ],
-
     observers: [
       'observeIdVisibility_(inDevMode, showingDetails_, data.id)',
     ],
 
     /** @private */
     observeIdVisibility_: function(inDevMode, showingDetails, id) {
       Polymer.dom.flush();
       var idElement = this.$$('#extension-id');
       if (idElement) {
         assert(this.data);
@@ skipping 146 matching lines @@
       return this.data.blacklistText ? 'severe' : 'mild';
     },
   });
 
   return {
     Item: Item,
     ItemDelegate: ItemDelegate,
   };
 });