Fix another source of flakiness in ErrorPageTest

chrome/chrome.gyp

 # Copyright (c) 2009 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': {
     'chromium_code': 1,
 
     # Define the common dependencies that contain all the actual
     # Chromium functionality.  This list gets pulled in below by
@@ skipping 20 matching lines @@
       'ml', 'mr', 'nb', 'nl', 'or', 'pl', 'pt-BR', 'pt-PT', 'ro',
       'ru', 'sk', 'sl', 'sr', 'sv', 'ta', 'te', 'th', 'tr',
       'uk', 'vi', 'zh-CN', 'zh-TW',
     ],
     'repack_locales_cmd': ['python', 'tools/build/repack_locales.py',],
     'browser_tests_sources': [
       'browser/browser_browsertest.cc',
       'browser/browser_init_browsertest.cc',
       'browser/crash_recovery_browsertest.cc',
       'browser/download/save_page_browsertest.cc',
-      'browser/errorpage_browsertest.cc',
       'browser/ssl/ssl_browser_tests.cc',
     ],
     'browser_tests_sources_win_specific': [
       'browser/extensions/extension_apitest.cc',
       'browser/extensions/extension_apitest.h',
       'browser/extensions/extension_bookmarks_apitest.cc',
       'browser/extensions/extension_devtools_browsertest.cc',
       'browser/extensions/extension_devtools_browsertest.h',
       'browser/extensions/extension_devtools_browsertests.cc',
       'browser/extensions/extension_browsertest.cc',
@@ skipping 5780 matching lines @@
               # Use outputs of this action as inputs for the main target build.
               # Seems as a misnomer but makes this happy on Linux (scons).
               'process_outputs_as_sources': 1,
             },
           ],  # 'actions'
         },
       ]
     }],
   ],  # 'conditions'
 }