Add a commandline flag to chrome to validate crx files

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 1217 matching lines @@
         'browser/extensions/api/proxy/proxy_apitest.cc',
         'browser/extensions/api/push_messaging/push_messaging_apitest.cc',
         'browser/extensions/api/push_messaging/push_messaging_canary_test.cc',
         'browser/extensions/api/push_messaging/sync_setup_helper.cc',
         'browser/extensions/api/record/record_api_test.cc',
         'browser/extensions/api/rtc_private/rtc_private_apitest.cc',
         'browser/extensions/api/runtime/runtime_apitest.cc',
         'browser/extensions/api/serial/serial_apitest.cc',
         'browser/extensions/api/session_restore/session_restore_apitest.cc',
         'browser/extensions/api/socket/socket_apitest.cc',
+        'browser/extensions/api/storage/settings_apitest.cc',
         'browser/extensions/api/streams_private/streams_resource_throttle_browsertest.cc',
         'browser/extensions/api/sync_file_system/sync_file_system_apitest.cc',
         'browser/extensions/api/system_indicator/system_indicator_apitest.cc',
         'browser/extensions/api/system_info_cpu/system_info_cpu_apitest.cc',
         'browser/extensions/api/system_info_display/system_info_display_apitest.cc',
         'browser/extensions/api/system_info_memory/system_info_memory_apitest.cc',
         'browser/extensions/api/system_info_storage/system_info_storage_apitest.cc',
         'browser/extensions/api/tab_capture/tab_capture_apitest.cc',
         'browser/extensions/api/tabs/tabs_test.cc',
         'browser/extensions/api/terminal/terminal_private_apitest.cc',
@@ skipping 55 matching lines @@
         'browser/extensions/mutation_observers_apitest.cc',
         'browser/extensions/options_page_apitest.cc',
         'browser/extensions/page_action_browsertest.cc',
         'browser/extensions/platform_app_browsertest.cc',
         'browser/extensions/platform_app_browsertest_util.cc',
         'browser/extensions/platform_app_browsertest_util.h',
         'browser/extensions/plugin_apitest.cc',
         'browser/extensions/process_management_browsertest.cc',
         'browser/extensions/requirements_checker_browsertest.cc',
         'browser/extensions/sandboxed_pages_apitest.cc',
-        'browser/extensions/api/storage/settings_apitest.cc',
+        'browser/extensions/startup_helper_browsertest.cc',
         'browser/extensions/stubs_apitest.cc',
         'browser/extensions/subscribe_page_action_browsertest.cc',
         'browser/extensions/api/system_private/system_private_apitest.cc',
         'browser/extensions/web_contents_browsertest.cc',
         'browser/extensions/web_view_browsertest.cc',
         'browser/extensions/webstore_startup_installer_browsertest.cc',
         'browser/extensions/window_open_apitest.cc',
         'browser/external_extension_browsertest.cc',
         'browser/fast_shutdown_browsertest.cc',
         'browser/first_run/first_run_browsertest.cc',
@@ skipping 1901 matching lines @@
               # more details.
               'DebugInformationFormat': '3',
               'ProgramDataBaseFileName': '<(PRODUCT_DIR)/browser_tests.exe.pdb',
             },
           },
         },
       ],
     }],
   ],  # 'conditions'
 }