WebUI: Move test_browser_proxy.js one level up.

chrome/test/data/webui/settings/fingerprint_browsertest_chromeos.js

 // Copyright 2017 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.FingerprintBrowserProxy}
- * @extends {settings.TestBrowserProxy}
+ * @extends {TestBrowserProxy}
  */
 var TestFingerprintBrowserProxy = function() {
-  settings.TestBrowserProxy.call(this, [
+  TestBrowserProxy.call(this, [
     'getFingerprintsList',
     'getNumFingerprints',
     'startEnroll',
     'cancelCurrentEnroll',
     'getEnrollmentLabel',
     'removeEnrollment',
     'changeEnrollmentLabel',
     'startAuthentication',
     'endCurrentAuthentication',
   ]);
 
   /** @private {!Array<string>} */
   this.fingerprintsList_ = [];
 };
 
 TestFingerprintBrowserProxy.prototype = {
-  __proto__: settings.TestBrowserProxy.prototype,
+  __proto__: TestBrowserProxy.prototype,
 
   /** @ param {!Array<string>} fingerprints */
   setFingerprints: function(fingerprints) {
     this.fingerprintsList_ = fingerprints.slice();
   },
 
   /**
    * @param {settings.FingerprintResultType} result
    * @param {boolean} complete
    */
@@ skipping 262 matching lines @@
       return Promise.all([
           browserProxy.whenCalled('removeEnrollment'),
           browserProxy.whenCalled('getFingerprintsList')]);
     }).then(function() {
       assertEquals(4, fingerprintList.fingerprints_.length);
       assertFalse(
           fingerprintList.$$('.action-button').disabled);
     });
   });
 });