Make Mac first run store sentinel in Profile directory.

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 1092 matching lines @@
         'browser/first_run.cc',
         'browser/first_run.h',
         'browser/first_run_mac.mm',
         'browser/first_run_win.cc',
         'browser/first_run_gtk.cc',
         'browser/fonts_languages_window.h',
         'browser/gears_integration.cc',
         'browser/gears_integration.h',
         'browser/google_update.cc',
         'browser/google_update.h',
-        'browser/google_update_settings_linux.cc',
+        'browser/google_update_settings_posix.cc',
         'browser/google_update_settings_mac.mm',
         'browser/google_url_tracker.cc',
         'browser/google_url_tracker.h',
         'browser/google_util.cc',
         'browser/google_util.h',
         'browser/gtk/about_chrome_dialog.cc',
         'browser/gtk/about_chrome_dialog.h',
         'browser/gtk/active_window_watcher.cc',
         'browser/gtk/active_window_watcher.h',
         'browser/gtk/back_forward_button_gtk.cc',
@@ skipping 2734 matching lines @@
         'browser/download/save_package_unittest.cc',
         'browser/encoding_menu_controller_unittest.cc',
         'browser/extensions/extension_file_util_unittest.cc',
         'browser/extensions/extension_messages_unittest.cc',
         'browser/extensions/extension_process_manager_unittest.cc',
         'browser/extensions/extension_ui_unittest.cc',
         'browser/extensions/extension_updater_unittest.cc',
         'browser/extensions/extensions_service_unittest.cc',
         'browser/extensions/user_script_master_unittest.cc',
         'browser/find_backend_unittest.cc',
+        'browser/first_run_migration_mac_unittest.mm',
         'browser/global_keyboard_shortcuts_mac_unittest.cc',
         'browser/google_url_tracker_unittest.cc',
-        'browser/google_update_settings_linux_unittest.cc',
-        'browser/google_update_settings_mac_unittest.mm',
+        'browser/google_update_settings_posix_unittest.cc',
         'browser/gtk/bookmark_editor_gtk_unittest.cc',
         'browser/gtk/go_button_gtk_unittest.cc',
         'browser/gtk/options/cookies_view_unittest.cc',
         'browser/gtk/tabs/tab_renderer_gtk_unittest.cc',
         'browser/gtk/view_id_util_unittest.cc',
         'browser/history/expire_history_backend_unittest.cc',
         'browser/history/history_backend_unittest.cc',
         'browser/history/history_querying_unittest.cc',
         'browser/history/history_types_unittest.cc',
         'browser/history/history_unittest.cc',
@@ skipping 1756 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'
 }