Update chrome://device-emulator with newer Polymer guidelines

chrome/browser/resources/chromeos/emulator/battery_settings.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.
 
 var BatterySettings = Polymer({
   is: 'battery-settings',
 
+  behaviors: [Polymer.NeonAnimatableBehavior],
+
   properties: {
     /** The system's battery percentage. */
     batteryPercent: Number,
 
     /**
      * A string representing a value in the
      * PowerSupplyProperties_BatteryState enumeration.
      */
     batteryState: {
       type: String,
@@ skipping 44 matching lines @@
     },
 
     /** The ID of the current power source, or the empty string. */
     selectedPowerSourceId: String,
 
     /** A string representing the time left until the battery is discharged. */
     timeUntilEmpty: String,
 
     /** A string representing the time left until the battery is at 100%. */
     timeUntilFull: String,
-
-    /** The title for the settings section. */
-    title: {
-      type: String,
-      value: 'Power',
-    },
   },
 
   observers: [
     'powerSourcesChanged(powerSourceOptions.*)',
   ],
 
   initialize: function() {
     if (!this.initialized) {
       chrome.send('requestPowerInfo');
       this.initialized = true;
@@ skipping 64 matching lines @@
   },
 
   canBecomeSource: function(source, selectedId, powerSourceOptionsChange) {
     if (!source.connected || !this.isDualRole(source))
       return false;
     return !this.powerSourceOptions.some(function(source) {
       return source.connected && source.type == 'DedicatedCharger';
     });
   },
 });