Add OnceCallback support to PostTaskAndReplyWithResult

components/drive/chromeos/directory_loader.cc

 // Copyright 2014 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 "components/drive/chromeos/directory_loader.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <utility>
 
 #include "base/callback.h"
 #include "base/callback_helpers.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time/time.h"
 #include "components/drive/chromeos/change_list_loader.h"
 #include "components/drive/chromeos/change_list_loader_observer.h"
 #include "components/drive/chromeos/change_list_processor.h"
 #include "components/drive/chromeos/resource_metadata.h"
+#include "components/drive/drive_api_util.h"
 #include "components/drive/event_logger.h"
 #include "components/drive/file_system_core_util.h"
 #include "components/drive/job_scheduler.h"
 #include "google_apis/drive/drive_api_parser.h"
 #include "url/gurl.h"
 
 namespace drive {
 namespace internal {
 
 namespace {
@@ skipping 102 matching lines @@
       callback.Run(error);
       return;
     }
 
     DCHECK(file_list);
     std::unique_ptr<ChangeList> change_list(new ChangeList(*file_list));
     GURL next_url = file_list->next_link();
 
     ResourceEntryVector* entries = new ResourceEntryVector;
     loader_->loader_controller_->ScheduleRun(base::Bind(
-        base::IgnoreResult(
-            &base::PostTaskAndReplyWithResult<FileError, FileError>),
+        &drive::util::RunAsyncTask,
         base::RetainedRef(loader_->blocking_task_runner_), FROM_HERE,
         base::Bind(&ChangeListProcessor::RefreshDirectory,
                    loader_->resource_metadata_, directory_fetch_info_,
                    base::Passed(&change_list), entries),
         base::Bind(&FeedFetcher::OnDirectoryRefreshed,
                    weak_ptr_factory_.GetWeakPtr(), callback, next_url,
                    base::Owned(entries))));
   }
 
   void OnDirectoryRefreshed(
@@ skipping 410 matching lines @@
 
   // Also notify the observers.
   if (error == FILE_ERROR_OK && !directory_path->empty()) {
     for (auto& observer : observers_)
       observer.OnDirectoryReloaded(*directory_path);
   }
 }
 
 }  // namespace internal
 }  // namespace drive