WebUI: Move test_browser_proxy.js one level up.

chrome/test/data/webui/settings/appearance_fonts_page_test.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.
 
 /**
  * @constructor
  * @implements {settings.FontsBrowserProxy}
- * @extends {settings.TestBrowserProxy}
+ * @extends {test.TestBrowserProxy}
  */
 var TestFontsBrowserProxy = function() {
-  settings.TestBrowserProxy.call(this, [
+  test.TestBrowserProxy.call(this, [
     'fetchFontsData',
     'observeAdvancedFontExtensionAvailable',
     'openAdvancedFontSettings',
   ]);
 
   /** @private {!FontsData} */
   this.fontsData_ = {
     'fontList': [['font name', 'alternate', 'ltr']],
     'encodingList': [['encoding name', 'alternate', 'ltr']],
   };
 };
 
 TestFontsBrowserProxy.prototype = {
-  __proto__: settings.TestBrowserProxy.prototype,
+  __proto__: test.TestBrowserProxy.prototype,
 
   /** @override */
   fetchFontsData: function() {
     this.methodCalled('fetchFontsData');
     return Promise.resolve(this.fontsData_);
   },
 
   /** @override */
   observeAdvancedFontExtensionAvailable: function() {
     this.methodCalled('observeAdvancedFontExtensionAvailable');
@@ skipping 29 matching lines @@
 
   test('openAdvancedFontSettings', function() {
     cr.webUIListenerCallback('advanced-font-settings-installed', [true]);
     Polymer.dom.flush();
     var button = fontsPage.$$('#advancedButton');
     assert(!!button);
     MockInteractions.tap(button);
     return fontsBrowserProxy.whenCalled('openAdvancedFontSettings');
   });
 });