Disassociate argument type from return type in PostTaskAndReplyWithResult template.

base/file_util_proxy.cc

 // Copyright (c) 2012 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 "base/file_util_proxy.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/location.h"
@@ skipping 387 matching lines @@
       Bind(&FlushPlatformFile, file),
       Bind(&CallWithTranslatedParameter, callback));
 }
 
 // static
 bool FileUtilProxy::RelayFileTask(
     TaskRunner* task_runner,
     const tracked_objects::Location& from_here,
     const FileTask& file_task,
     const StatusCallback& callback) {
-  return base::PostTaskAndReplyWithResult(
-      task_runner, from_here, file_task, callback);
+  if (callback.is_null()) {
+    return task_runner->PostTask(from_here,
+                                 base::Bind(base::IgnoreResult(file_task)));
+  } else {
+    return base::PostTaskAndReplyWithResult(task_runner, from_here, file_task,
+                                            callback);
+  }
 }
 
 // static
 bool FileUtilProxy::RelayCreateOrOpen(
     TaskRunner* task_runner,
     const CreateOrOpenTask& open_task,
     const CloseTask& close_task,
     const CreateOrOpenCallback& callback) {
   CreateOrOpenHelper* helper = new CreateOrOpenHelper(
       task_runner, close_task);
   return task_runner->PostTaskAndReply(
       FROM_HERE,
       Bind(&CreateOrOpenHelper::RunWork, Unretained(helper), open_task),
       Bind(&CreateOrOpenHelper::Reply, Owned(helper), callback));
 }
 
 // static
 bool FileUtilProxy::RelayClose(
     TaskRunner* task_runner,
     const CloseTask& close_task,
     PlatformFile file_handle,
     const StatusCallback& callback) {
   return base::PostTaskAndReplyWithResult(
       task_runner, FROM_HERE, Bind(close_task, file_handle), callback);
 }
 
 }  // namespace base