WebUI: Move test_browser_proxy.js one level up.

chrome/test/data/webui/settings/people_page_change_picture_test.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.
 
 cr.define('settings_people_page_change_picture', function() {
   /**
    * @constructor
    * @implements {settings.ChangePictureBrowserProxy}
-   * @extends {settings.TestBrowserProxy}
+   * @extends {test.TestBrowserProxy}
    */
   var TestChangePictureBrowserProxy = function() {
-    settings.TestBrowserProxy.call(this, [
+    test.TestBrowserProxy.call(this, [
       'initialize',
       'selectDefaultImage',
       'selectOldImage',
       'selectProfileImage',
       'photoTaken',
       'chooseFile',
     ]);
   };
 
   TestChangePictureBrowserProxy.prototype = {
-    __proto__: settings.TestBrowserProxy.prototype,
+    __proto__: test.TestBrowserProxy.prototype,
 
     /** @override */
     initialize: function() {
       cr.webUIListenerCallback('profile-image-changed',
                                'fake-profile-image-url',
                                false /* selected */);
 
       var fakeDefaultImages = [
         {
           author: 'Author1',
@@ skipping 204 matching lines @@
       });
     });
   }
 
   return {
     registerTests: function() {
       registerChangePictureTests();
     },
   };
 });