Moved some functions off ExtensionService into a new file extension_util.

chrome/chrome_browser_extensions.gypi

 # Copyright (c) 2013 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_extensions',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
@@ skipping 711 matching lines @@
         'browser/extensions/extension_system_factory.cc',
         'browser/extensions/extension_system_factory.h',
         'browser/extensions/extension_sync_data.cc',
         'browser/extensions/extension_sync_data.h',
         'browser/extensions/extension_tab_util.cc',
         'browser/extensions/extension_tab_util.h',
         'browser/extensions/extension_toolbar_model.cc',
         'browser/extensions/extension_toolbar_model.h',
         'browser/extensions/extension_uninstall_dialog.cc',
         'browser/extensions/extension_uninstall_dialog.h',
+        'browser/extensions/extension_util.cc',
+        'browser/extensions/extension_util.h',
         'browser/extensions/extension_warning_badge_service.cc',
         'browser/extensions/extension_warning_badge_service.h',
         'browser/extensions/extension_warning_service.cc',
         'browser/extensions/extension_warning_service.h',
         'browser/extensions/extension_warning_set.cc',
         'browser/extensions/extension_warning_set.h',
         'browser/extensions/extension_web_ui.cc',
         'browser/extensions/extension_web_ui.h',
         'browser/extensions/extension_web_ui_override_registrar.cc',
         'browser/extensions/extension_web_ui_override_registrar.h',
@@ skipping 407 matching lines @@
           'variables': {
             'proto_in_dir': 'browser/chromeos/contacts',
             'proto_out_dir': 'chrome/browser/chromeos/contacts',
           },
           'includes': [ '../build/protoc.gypi' ]
         },
       ],
     },],  # 'chromeos=1'
   ],  # 'conditions'
 }