Make the gyp files more cross-platform across the Unices

chrome/default_plugin/default_plugin.gyp

 # Copyright (c) 2011 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,
    },
   'targets': [
     {
@@ skipping 33 matching lines @@
             'sources': [
               'default_plugin_resources.h',
               'install_dialog.cc',
               'install_dialog.h',
               'plugin_database_handler.cc',
               'plugin_database_handler.h',
               'plugin_install_job_monitor.cc',
               'plugin_install_job_monitor.h',
             ],
          }],
-         ['OS=="linux"', {
+         ['toolkit_uses_gtk==1', {
             'dependencies': [
               '<(DEPTH)/build/linux/system.gyp:gtk',
             ],
          }],
       ],
     },
     # This can't be part of chrome.gyp:chrome_resources because then there'd
     # be a cyclic dependency.
     {
       'target_name': 'default_plugin_resources',
@@ skipping 13 matching lines @@
       'includes': [ '../../build/grit_target.gypi' ],
     },
   ],
 }
 
 # Local Variables:
 # tab-width:2
 # indent-tabs-mode:nil
 # End:
 # vim: set expandtab tabstop=2 shiftwidth=2: