Be explicit about target type in platform_util::OpenItem()

chrome/chrome_browser.gypi

 # Copyright 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': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 489 matching lines @@
       'browser/native_window_notification_source.h',
       'browser/omnibox/omnibox_log.cc',
       'browser/omnibox/omnibox_log.h',
       'browser/performance_monitor/performance_monitor.cc',
       'browser/performance_monitor/performance_monitor.h',
       'browser/performance_monitor/process_metrics_history.cc',
       'browser/performance_monitor/process_metrics_history.h',
       'browser/platform_util.h',
       'browser/platform_util_android.cc',
       'browser/platform_util_chromeos.cc',
+      'browser/platform_util_internal.h',
       'browser/platform_util_mac.mm',
       'browser/platform_util_win.cc',
       'browser/precache/most_visited_urls_provider.cc',
       'browser/precache/most_visited_urls_provider.h',
       'browser/pref_service_flags_storage.cc',
       'browser/pref_service_flags_storage.h',
       'browser/prefetch/prefetch.cc',
       'browser/prefetch/prefetch.h',
       'browser/prefetch/prefetch_field_trial.cc',
       'browser/prefetch/prefetch_field_trial.h',
@@ skipping 224 matching lines @@
     'chrome_browser_non_chromeos_sources': [
       'browser/signin/signin_global_error.cc',
       'browser/signin/signin_global_error.h',
       'browser/signin/signin_global_error_factory.cc',
       'browser/signin/signin_global_error_factory.h',
       'browser/sync/sync_global_error_factory.cc',
       'browser/sync/sync_global_error_factory.h',
     ],
     # Everything but Android, iOS, and CrOS.
     'chrome_browser_desktop_sources': [
+      'browser/platform_util.cc',
       'browser/profiles/avatar_menu_desktop.cc',
       'browser/profiles/avatar_menu_observer.h',
       'browser/profiles/avatar_menu_actions_desktop.cc',
       'browser/profiles/avatar_menu_actions_desktop.h',
       'browser/profiles/profile_list_desktop.cc',
       'browser/profiles/profile_list_desktop.h',
     ],
     # Miscellaneous files that were brought up on iOS before the decision not
     # to use chrome/ for iOS. These, plus a few of the directory-specific
     # source lists below, are all that are built on iOS. These are built
@@ skipping 2936 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/sync_file_system/drive_backend',
             'proto_out_dir': 'chrome/browser/sync_file_system/drive_backend',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],
   ],
 }