Undo the startup_helper_win.h change in r143501 because that breaks the sandbox in component builds.

chrome/chrome_tests.gypi

 # Copyright (c) 2012 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 495 matching lines @@
         'browser/ui/views/find_bar_host_interactive_uitest.cc',
         'browser/ui/views/menu_item_view_test.cc',
         'browser/ui/views/menu_model_adapter_test.cc',
         'browser/ui/views/ssl_client_certificate_selector_browsertest.cc',
         'browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc',
         'browser/ui/views/tabs/tab_drag_controller_interactive_uitest.h',
         'browser/ui/views/tabs/tab_drag_controller_interactive_uitest_win.cc',
         'test/base/chrome_test_launcher.cc',
         'test/base/view_event_test_base.cc',
         'test/base/view_event_test_base.h',
+        '../content/app/startup_helper_win.cc',
         '../content/browser/mouseleave_browsertest.cc',
       ],
       'conditions': [
         ['toolkit_uses_gtk == 1', {
           'dependencies': [
             '../build/linux/system.gyp:gtk',
             '../tools/xdisplaycheck/xdisplaycheck.gyp:xdisplaycheck',
           ],
           'sources!': [
             'browser/ui/views/tabs/tab_drag_controller_interactive_uitest.cc',
@@ skipping 2467 matching lines @@
         'test/data/webui/print_preview.cc',
         'test/data/webui/print_preview.h',
         'test/data/webui/print_preview.js',
         'test/data/webui/suidsandbox_browsertest.js',
         'test/gpu/gpu_feature_browsertest.cc',
         'test/security_tests/sandbox_browsertest.cc',
         'test/ui/ppapi_uitest.cc',
         # TODO(craig): Rename this and run from base_unittests when the test
         # is safe to run there. See http://crbug.com/78722 for details.
         '../base/files/file_path_watcher_browsertest.cc',
+        '../content/app/startup_helper_win.cc',
         '../content/browser/accessibility/cross_platform_accessibility_browsertest.cc',
         '../content/browser/accessibility/dump_accessibility_tree_browsertest.cc',
         '../content/browser/accessibility/dump_accessibility_tree_helper.cc',
         '../content/browser/accessibility/dump_accessibility_tree_helper.h',
         '../content/browser/accessibility/dump_accessibility_tree_helper_mac.mm',
         '../content/browser/accessibility/dump_accessibility_tree_helper_win.cc',
         '../content/browser/appcache/appcache_browsertest.cc',
         '../content/browser/audio_browsertest.cc',
         '../content/browser/child_process_security_policy_browsertest.cc',
         '../content/browser/device_orientation/device_orientation_browsertest.cc',
@@ skipping 398 matching lines @@
         'app/chrome_dll.rc',
         'app/chrome_dll_resource.h',
         'app/chrome_version.rc.version',
         'test/base/chrome_render_view_test.cc',
         'test/base/chrome_render_view_test.h',
         'test/base/chrome_test_launcher.cc',
         'test/perf/browser_perf_test.cc',
         'test/perf/browser_perf_test.h',
         'test/perf/rendering/latency_tests.cc',
         'test/perf/rendering/throughput_tests.cc',
+        '../content/app/startup_helper_win.cc',
       ],
       'rules': [
         {
           'rule_name': 'js2webui',
           'extension': 'js',
           'msvs_external_rule': 1,
           'inputs': [
             '<(gypv8sh)',
             '<(PRODUCT_DIR)/v8_shell<(EXECUTABLE_SUFFIX)',
             '<(mock_js)',
@@ skipping 125 matching lines @@
         '..',
       ],
       'defines': [
         'HAS_OUT_OF_PROC_TEST_RUNNER',
         'BROWSER_TESTS_HEADER_OVERRIDE="chrome/test/base/in_process_browser_test.h"',
       ],
       'sources': [
         'app/chrome_dll.rc',
         'browser/safe_browsing/safe_browsing_test.cc',
         'test/base/chrome_test_launcher.cc',
+        '../content/app/startup_helper_win.cc',
       ],
       'conditions': [
         ['safe_browsing==0', {
           'sources!': [
             'browser/safe_browsing/safe_browsing_test.cc',
           ],
         }],
         ['OS=="win"', {
           'dependencies': [
             'chrome_version_resources',
@@ skipping 343 matching lines @@
         'browser/sync/test/integration/two_client_extension_settings_and_app_settings_sync_test.cc',
         'browser/sync/test/integration/two_client_extensions_sync_test.cc',
         'browser/sync/test/integration/two_client_passwords_sync_test.cc',
         'browser/sync/test/integration/two_client_preferences_sync_test.cc',
         'browser/sync/test/integration/two_client_search_engines_sync_test.cc',
         'browser/sync/test/integration/two_client_sessions_sync_test.cc',
         'browser/sync/test/integration/two_client_themes_sync_test.cc',
         'browser/sync/test/integration/two_client_typed_urls_sync_test.cc',
         'browser/sync/test/integration/typed_urls_helper.cc',
         'browser/sync/test/integration/typed_urls_helper.h',
+        '../content/app/startup_helper_win.cc',
       ],
       'conditions': [
         ['toolkit_uses_gtk == 1', {
            'dependencies': [
              '../build/linux/system.gyp:gtk',
            ],
         }],
         ['toolkit_uses_gtk == 1 or chromeos==1 or (OS=="linux" and use_aura==1)', {
           'dependencies': [
             '../build/linux/system.gyp:ssl',
@@ skipping 102 matching lines @@
         'browser/sync/test/integration/sync_datatype_helper.cc',
         'browser/sync/test/integration/sync_datatype_helper.h',
         'browser/sync/test/integration/sync_extension_helper.cc',
         'browser/sync/test/integration/sync_extension_helper.h',
         'browser/sync/test/integration/sync_test.cc',
         'browser/sync/test/integration/sync_test.h',
         'browser/sync/test/integration/typed_urls_helper.cc',
         'browser/sync/test/integration/typed_urls_helper.h',
         'test/base/chrome_test_launcher.cc',
         'test/data/resource.rc',
+        '../content/app/startup_helper_win.cc',
       ],
       'conditions': [
         ['toolkit_uses_gtk == 1', {
            'dependencies': [
              '../build/linux/system.gyp:gtk',
            ],
         }],
         ['toolkit_uses_gtk == 1 or chromeos==1 or (OS=="linux" and use_aura==1)', {
           'dependencies': [
             '../build/linux/system.gyp:ssl',
@@ skipping 586 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'
         },
       ]
     }],  # 'coverage!=0'
   ],  # 'conditions'
 }