WebUI: Move test_browser_proxy.js one level up.

chrome/test/data/webui/settings/import_data_dialog_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.ImportDataBrowserProxy}
- * @extends {settings.TestBrowserProxy}
+ * @extends {TestBrowserProxy}
  */
 var TestImportDataBrowserProxy = function() {
-  settings.TestBrowserProxy.call(this, [
+  TestBrowserProxy.call(this, [
     'initializeImportDialog',
     'importFromBookmarksFile',
     'importData',
   ]);
 
   /** @private {!Array<!settings.BrowserProfile} */
   this.browserProfiles_ = [];
 };
 
 TestImportDataBrowserProxy.prototype = {
-  __proto__: settings.TestBrowserProxy.prototype,
+  __proto__: TestBrowserProxy.prototype,
 
   /** @param {!Array<!settings.BrowserProfile} browserProfiles */
   setBrowserProfiles: function(browserProfiles) {
     this.browserProfiles_ = browserProfiles;
   },
 
   /** @override */
   initializeImportDialog: function() {
     this.methodCalled('initializeImportDialog');
     return Promise.resolve(this.browserProfiles_.slice());
@@ skipping 156 matching lines @@
       assertFalse(dialog.$.successIcon.parentElement.hidden);
       assertTrue(dialog.$$('settings-toggle-button').parentElement.hidden);
     });
   });
 
   test('ImportError', function() {
     simulateImportStatusChange(settings.ImportDataStatus.FAILED);
     assertFalse(dialog.$.dialog.open);
   });
 });