Use the new callback tracker and delete the old one

webkit/plugins/ppapi/ppb_directory_reader_impl.cc

 // 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.
 
 #include "webkit/plugins/ppapi/ppb_directory_reader_impl.h"
 
 #include "base/logging.h"
 #include "base/utf_string_conversions.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
@@ skipping 79 matching lines @@
   if (FillUpEntry()) {
     entry_ = NULL;
     return PP_OK;
   }
   PluginInstance* plugin_instance = ResourceHelper::GetPluginInstance(this);
   if (!plugin_instance)
     return PP_ERROR_FAILED;
 
   if (!plugin_instance->delegate()->ReadDirectory(
           directory_ref_->GetFileSystemURL(),
-          new FileCallbacks(plugin_instance->module()->AsWeakPtr(),
-                            pp_resource(), callback, NULL, NULL, this)))
+          new FileCallbacks(this, callback, NULL, NULL, this)))
     return PP_ERROR_FAILED;
 
   return PP_OK_COMPLETIONPENDING;
 }
 
 void PPB_DirectoryReader_Impl::AddNewEntries(
     const std::vector<base::FileUtilProxy::Entry>& entries, bool has_more) {
   DCHECK(!entries.empty() || !has_more);
   has_more_ = has_more;
 
@@ skipping 37 matching lines @@
   if (!has_more_) {
     entry_->file_ref = 0;
     return true;
   }
 
   return false;
 }
 
 }  // namespace ppapi
 }  // namespace webkit