Use the new callback tracker and delete the old one

webkit/tools/test_shell/test_shell.gypi

 # 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': {
     'test_shell_windows_resource_files': [
       'resources/test_shell.rc',
       '../../glue/resources/pan_east.cur',
       '../../glue/resources/pan_middle.cur',
@@ skipping 426 matching lines @@
         '../../media/test_response_generator.h',
         '../../media/video_renderer_impl_unittest.cc',
         '../../mocks/mock_resource_loader_bridge.h',
         '../../mocks/mock_webframeclient.h',
         '../../mocks/mock_weburlloader.cc',
         '../../mocks/mock_weburlloader.h',
         '../../plugins/npapi/plugin_group_unittest.cc',
         '../../plugins/npapi/plugin_lib_unittest.cc',
         '../../plugins/npapi/plugin_list_unittest.cc',
         '../../plugins/npapi/webplugin_impl_unittest.cc',
-        '../../plugins/ppapi/callbacks_unittest.cc',
         '../../plugins/ppapi/host_var_tracker_unittest.cc',
         '../../plugins/ppapi/mock_plugin_delegate.cc',
         '../../plugins/ppapi/mock_plugin_delegate.h',
         '../../plugins/ppapi/mock_resource.h',
         '../../plugins/ppapi/ppapi_unittest.cc',
         '../../plugins/ppapi/ppapi_unittest.h',
         '../../plugins/ppapi/ppb_file_chooser_impl_unittest.cc',
         '../../plugins/ppapi/quota_file_io_unittest.cc',
         '../../plugins/ppapi/time_conversion_unittest.cc',
         '../../plugins/ppapi/url_request_info_unittest.cc',
@@ skipping 303 matching lines @@
           'link_settings': {
             'libraries': [
               '$(SDKROOT)/System/Library/Frameworks/AppKit.framework',
             ],
           },
         },
       ],
     }],
   ],
 }