WebUI: Move test_browser_proxy.js one level up.

chrome/test/data/webui/settings/test_lifetime_browser_proxy.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.
 
 cr.define('settings', function() {
   /**
    * A test version of LifetimeBrowserProxy.
    *
    * @constructor
    * @implements {settings.LifetimeBrowserProxy}
-   * @extends {settings.TestBrowserProxy}
+   * @extends {TestBrowserProxy}
    */
   var TestLifetimeBrowserProxy = function() {
     var methodNames = ['restart', 'relaunch'];
     if (cr.isChromeOS)
       methodNames.push('signOutAndRestart', 'factoryReset');
 
-    settings.TestBrowserProxy.call(this, methodNames);
+    TestBrowserProxy.call(this, methodNames);
   };
 
   TestLifetimeBrowserProxy.prototype = {
-    __proto__: settings.TestBrowserProxy.prototype,
+    __proto__: TestBrowserProxy.prototype,
 
     /** @override */
     restart: function() {
       this.methodCalled('restart');
     },
 
     /** @override */
     relaunch: function() {
       this.methodCalled('relaunch');
     },
   };
 
   if (cr.isChromeOS) {
     /** @override */
     TestLifetimeBrowserProxy.prototype.signOutAndRestart = function() {
       this.methodCalled('signOutAndRestart');
     };
 
     /** @override */
     TestLifetimeBrowserProxy.prototype.factoryReset = function() {
       this.methodCalled('factoryReset');
     };
   }
 
   return {
     TestLifetimeBrowserProxy: TestLifetimeBrowserProxy,
   };
 });