Move PostTaskAndReplyWithResult() adapters to a separate header.

base/task_runner_util.h

 // 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.
 
 #ifndef BASE_TASK_RUNNER_UTIL_H_
 #define BASE_TASK_RUNNER_UTIL_H_
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
+#include "base/post_task_and_reply_with_result_internal.h"
 #include "base/task_runner.h"
 
 namespace base {
 
-namespace internal {
-
-// Adapts a function that produces a result via a return value to
-// one that returns via an output parameter.
-template <typename ReturnType>
-void ReturnAsParamAdapter(const Callback<ReturnType(void)>& func,
-                          ReturnType* result) {
-  *result = func.Run();
-}
-
-// Adapts a T* result to a callblack that expects a T.
-template <typename TaskReturnType, typename ReplyArgType>
-void ReplyAdapter(const Callback<void(ReplyArgType)>& callback,
-                  TaskReturnType* result) {
-  callback.Run(std::move(*result));
-}
-
-}  // namespace internal
-
 // When you have these methods
 //
 //   R DoWorkAndReturn();
 //   void Callback(const R& result);
 //
 // and want to call them in a PostTaskAndReply kind of fashion where the
 // result of DoWorkAndReturn is passed to the Callback, you can use
 // PostTaskAndReplyWithResult as in this example:
 //
 // PostTaskAndReplyWithResult(
@@ skipping 14 matching lines @@
       from_here,
       base::Bind(&internal::ReturnAsParamAdapter<TaskReturnType>, task,
                  result),
       base::Bind(&internal::ReplyAdapter<TaskReturnType, ReplyArgType>, reply,
                  base::Owned(result)));
 }
 
 }  // namespace base
 
 #endif  // BASE_TASK_RUNNER_UTIL_H_