MD Settings: add <controlled-button>#endJustified to flip controlled by indicator position

chrome/browser/resources/settings/controls/controlled_button.js

 // Copyright 2016 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.
 
 Polymer({
   is: 'controlled-button',
 
   behaviors: [
     CrPolicyIndicatorBehavior,
     CrPolicyPrefBehavior,
     PrefControlBehavior,
   ],
 
   properties: {
+    endJustified: {
+      type: Boolean,
+      value: false,
+      reflectToAttribute: true,
+    },
+
     /** @private */
     controlled_: {
       type: Boolean,
       computed: 'computeControlled_(pref.*)',
       reflectToAttribute: true,
     },
   },
 
   /**
    * @return {boolean} Whether the button is disabled.
@@ skipping 18 matching lines @@
    * @return {boolean} Whether to show a controlled by indicator.
    * @private
    */
   showIndicator_: function(pref) {
     if (!pref.controlledBy || !pref.enforcement)
       return false;
     var indicator = this.getIndicatorType(pref.controlledBy, pref.enforcement);
     return this.isIndicatorVisible(indicator);
   },
 });