Allow overriding of X error functions

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 275 matching lines @@
         'browser/browser_init.cc',
         'browser/browser_init.h',
         'browser/browser_list_gtk.cc',
         'browser/browser_list_mac.mm',
         'browser/browser_list_stub.cc',
         'browser/browser_list_win.cc',
         'browser/browser_list.cc',
         'browser/browser_list.h',
         'browser/browser_main.cc',
         'browser/browser_main_gtk.cc',
+        'browser/browser_main_gtk.h',
         'browser/browser_main_mac.mm',
         'browser/browser_main_posix.cc',
         'browser/browser_main_posix.h',
         'browser/browser_main_win.cc',
         'browser/browser_main_win.h',
         'browser/browser_process.cc',
         'browser/browser_process.h',
         'browser/browser_process_impl.cc',
         'browser/browser_process_impl.h',
         'browser/browser_process_sub_thread.cc',
@@ skipping 3668 matching lines @@
       ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: