[Mac] Enable click-drag-release behavior in the Wrench menu's custom items.

chrome/chrome_browser.gypi

 # Copyright (c) 2010 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.
 
 {
   'targets': [
     {
       'target_name': 'browser',
       'type': '<(library)',
       'msvs_guid': '5BF908A7-68FB-4A4B-99E3-8C749F1FE4EA',
@@ skipping 907 matching lines @@
         'browser/cocoa/location_bar/page_action_decoration.h',
         'browser/cocoa/location_bar/page_action_decoration.mm',
         'browser/cocoa/location_bar/selected_keyword_decoration.h',
         'browser/cocoa/location_bar/selected_keyword_decoration.mm',
         'browser/cocoa/location_bar/star_decoration.h',
         'browser/cocoa/location_bar/star_decoration.mm',
         'browser/cocoa/menu_button.h',
         'browser/cocoa/menu_button.mm',
         'browser/cocoa/menu_controller.h',
         'browser/cocoa/menu_controller.mm',
+        'browser/cocoa/menu_tracked_button.h',
+        'browser/cocoa/menu_tracked_button.mm',
+        'browser/cocoa/menu_tracked_root_view.h',
+        'browser/cocoa/menu_tracked_root_view.mm',
         'browser/cocoa/multi_key_equivalent_button.h',
         'browser/cocoa/multi_key_equivalent_button.mm',
         'browser/cocoa/new_tab_button.h',
         'browser/cocoa/new_tab_button.mm',
         'browser/cocoa/notifications/balloon_controller.mm',
         'browser/cocoa/notifications/balloon_controller.h',
         'browser/cocoa/notifications/balloon_view_bridge.h',
         'browser/cocoa/notifications/balloon_view_bridge.mm',
         'browser/cocoa/notifications/balloon_view_host_mac.h',
         'browser/cocoa/notifications/balloon_view_host_mac.mm',
@@ skipping 2782 matching lines @@
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: