Clear the clipboard closing Incognito window

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' : {
     'pyautolib_sources': [
       'app/chrome_command_ids.h',
       'app/chrome_dll_resource.h',
       'common/automation_constants.h',
       'common/pref_names.cc',
@@ skipping 158 matching lines @@
       ],
       'include_dirs': [
         '..',
       ],
       'defines': [
         'HAS_OUT_OF_PROC_TEST_RUNNER',
         'INTERACTIVE_TESTS',
       ],
       'sources': [
         'browser/browser_keyevents_browsertest.cc',
+        'browser/clipboard/clipboard_interactive_uitest.cc',
         'browser/extensions/api/tabs/tabs_interactive_test.cc',
         'browser/extensions/extension_apitest.cc',
         'browser/extensions/extension_browsertest.cc',
         'browser/extensions/extension_crash_recovery_browsertest.cc',
         'browser/extensions/extension_function_test_utils.cc',
         'browser/extensions/extension_keybinding_apitest.cc',
         'browser/extensions/notifications_apitest.cc',
         'browser/extensions/window_open_interactive_apitest.cc',
         'browser/extensions/extension_pointer_lock_apitest.cc',
         'browser/instant/instant_browsertest.cc',
@@ skipping 2801 matching lines @@
             'sync_integration_tests.isolate',
           ],
           'sources': [
             'sync_integration_tests.isolate',
           ],
         },
       ],
     }],
   ],  # 'conditions'
 }