[MD settings] flag to enable site settings All sites and Site details pages

chrome/browser/resources/settings/site_settings_page/site_settings_page.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.
 
 /**
  * @fileoverview
  * 'settings-site-settings-page' is the settings page containing privacy and
  * security site settings.
  */
 Polymer({
   is: 'settings-site-settings-page',
 
   behaviors: [SiteSettingsBehavior],
 
   properties: {
+    /** @private */
+    enableSiteSettings_: {
+      type: Boolean,
+      value: function() {
+        return loadTimeData.getBoolean('enableSiteSettings');
+      },
+    },
+
     /**
      * The category selected by the user.
      */
     categorySelected: {
       type: String,
       notify: true,
     },
   },
 
   ready: function() {
@@ skipping 38 matching lines @@
    * @param {!Event} event The tap event.
    */
   onTapCategory: function(event) {
     var category = event.currentTarget.getAttribute('category');
     if (category == settings.ALL_SITES)
       settings.navigateTo(settings.Route.SITE_SETTINGS_ALL);
     else
       settings.navigateTo(this.computeCategoryRoute(category));
   },
 });