Add a content_resources target which currently includes the sandbox definitions on mac

chrome/chrome_resources.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': {
     'grit_out_dir': '<(SHARED_INTERMEDIATE_DIR)/chrome',
     'repack_locales_cmd': ['python', 'tools/build/repack_locales.py'],
   },
   'targets': [
     {
@@ skipping 283 matching lines @@
         'repack_path': '../tools/grit/grit/format/repack.py',
       },
       'dependencies': [
         # MSVS needs the dependencies explictly named, Make is able to
         # derive the dependencies from the output files.
         'chrome_resources',
         'chrome_strings',
         'default_plugin/default_plugin.gyp:default_plugin_resources',
         'platform_locale_settings',
         'theme_resources',
+        '<(DEPTH)/content/content_resources.gyp:content_resources',
         '<(DEPTH)/net/net.gyp:net_resources',
         '<(DEPTH)/ui/base/strings/ui_strings.gyp:ui_strings',
         '<(DEPTH)/ui/ui.gyp:gfx_resources',
         '<(DEPTH)/ui/ui.gyp:ui_resources',
         '<(DEPTH)/ui/ui.gyp:ui_resources_large',
         '<(DEPTH)/ui/ui.gyp:ui_resources_standard',
         '<(DEPTH)/webkit/support/webkit_support.gyp:webkit_resources',
         '<(DEPTH)/webkit/support/webkit_support.gyp:webkit_strings',
       ],
       'actions': [
@@ skipping 44 matching lines @@
                   'files': ['<@(default_apps_list)']
                 },
               ],
             }],
           ], # conditions
         }], # end OS != "mac"
       ], # conditions
     },
   ], # targets
 }