Upgrade to 1.0 and switch clients to dom-repeat where needed.

chrome/browser/resources/settings/prefs/prefs.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
  * 'cr-settings-prefs' is an element which serves as a model for
  * interaction with settings which are stored in Chrome's
  * Preferences.
  *
@@ skipping 66 matching lines @@
         let root = this.prefStore;
         let tokens = prefObj.key.split('.');
 
         assert(tokens.length > 0);
 
         for (let i = 0; i < tokens.length; i++) {
           let token = tokens[i];
 
           if (!root.hasOwnProperty(token)) {
             let path = 'prefStore.' + tokens.slice(0, i + 1).join('.');
-            this.setPathValue(path, {});
+            this.set(path, {});
           }
           root = root[token];
         }
 
         // NOTE: Do this copy rather than just a re-assignment, so that the
         // observer fires.
         for (let objKey in prefObj) {
           let path = 'prefStore.' + prefObj.key + '.' + objKey;
-          this.setPathValue(path, prefObj[objKey]);
+          this.set(path, prefObj[objKey]);
         }
 
         if (shouldObserve) {
           Object.observe(root, this.propertyChangeCallback_, ['update']);
         }
       }, this);
     },
 
     /**
      * Called when a property of a pref changes.
@@ skipping 12 matching lines @@
 
         chrome.settingsPrivate.setPref(
             change.object['key'],
             newValue,
             /* pageId */ '',
             /* callback */ function() {});
       });
     },
   });
 })();