Replace ancient crufty AppCacheThread with much improved MessageLoopProxy usage.

webkit/appcache/webkit_appcache.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': 'appcache',
       'type': 'static_library',
       'dependencies': [
@@ skipping 30 matching lines @@
         'appcache_request_handler.cc',
         'appcache_request_handler.h',
         'appcache_response.cc',
         'appcache_response.h',
         'appcache_service.cc',
         'appcache_service.h',
         'appcache_storage.cc',
         'appcache_storage.h',
         'appcache_storage_impl.cc',
         'appcache_storage_impl.h',
-        'appcache_thread.cc',
-        'appcache_thread.h',
         'appcache_working_set.cc',
         'appcache_working_set.h',
         'appcache_update_job.cc',
         'appcache_update_job.h',
         'appcache_url_request_job.cc',
         'appcache_url_request_job.h',
         'manifest_parser.cc',
         'manifest_parser.h',
         'view_appcache_internals_job.h',
         'view_appcache_internals_job.cc',
         'web_application_cache_host_impl.cc',
         'web_application_cache_host_impl.h',
         'webkit_appcache.gypi',
       ],
       'conditions': [
         ['inside_chromium_build==0', {
           'dependencies': [
             '<(DEPTH)/webkit/support/setup_third_party.gyp:third_party_headers',
           ],
         }],
       ],
     },
   ],
 }