Cancel client auth requests when not promptable.

chrome/chrome_tests.gypi

 # Copyright 2013 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.
 {
   'variables': {
     'chrome_browser_extensions_test_support_sources': [
       # A list of sources which is shared between different browser tests.
       'browser/apps/app_browsertest_util.cc',
       'browser/apps/app_browsertest_util.h',
       'browser/extensions/browsertest_util.cc',
@@ skipping 199 matching lines @@
       'browser/extensions/api/web_navigation/web_navigation_apitest.cc',
       'browser/extensions/api/web_request/web_request_apitest.cc',
       'browser/extensions/api/webrtc_audio_private/webrtc_audio_private_browsertest.cc',
       'browser/extensions/api/webrtc_logging_private/webrtc_logging_private_apitest.cc',
       'browser/extensions/api/webstore_private/webstore_private_apitest.cc',
       'browser/extensions/app_background_page_apitest.cc',
       'browser/extensions/app_process_apitest.cc',
       'browser/extensions/background_app_browsertest.cc',
       'browser/extensions/background_page_apitest.cc',
       'browser/extensions/background_scripts_apitest.cc',
+      'browser/extensions/background_xhr_browsertest.cc',
       'browser/extensions/browsertest_util_browsertest.cc',
       'browser/extensions/chrome_app_api_browsertest.cc',
       'browser/extensions/chrome_ui_overrides_browsertest.cc',
       'browser/extensions/content_capabilities_browsertest.cc',
       'browser/extensions/content_script_apitest.cc',
       'browser/extensions/content_security_policy_apitest.cc',
       'browser/extensions/content_verifier_browsertest.cc',
       'browser/extensions/convert_web_app_browsertest.cc',
       'browser/extensions/crazy_extension_browsertest.cc',
       'browser/extensions/cross_origin_xhr_apitest.cc',
@@ skipping 2939 matching lines @@
             ['enable_webrtc==1', {
               'dependencies': [
                 '../third_party/libjingle/libjingle.gyp:libjingle_webrtc'
               ]
             }],
           ],
         }]
     }],
   ],  # 'conditions'
 }