[MD settings] drawer menu icon into title bar; icon colors

chrome/browser/resources/settings/settings_ui/settings_ui.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-ui' implements the UI for the Settings page.
  *
  * Example:
  *
  *    <settings-ui prefs="{{prefs}}"></settings-ui>
  */
 Polymer({
   is: 'settings-ui',
 
+  behaviors: [I18nBehavior],
+
   properties: {
     /**
      * Preferences state.
      * @type {?CrSettingsPrefsElement}
      */
     prefs: Object,
 
     /** @type {?settings.DirectionDelegate} */
     directionDelegate: {
       observer: 'directionDelegateChanged_',
       type: Object,
     },
   },
 
   /** @private */
   directionDelegateChanged_: function() {
     this.$.panel.rightDrawer = this.directionDelegate.isRtl();
   },
 });