Make new TaskRunner, SequencedTaskRunner, and SingleThreadTaskRunner interfaces

base/sequenced_task_runner.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/sequenced_task_runner.h"
+
+#include "base/bind.h"
+
+namespace base {
+
+bool SequencedTaskRunner::PostNonNestableTask(
+    const tracked_objects::Location& from_here,
+    const Closure& task) {
+  return PostNonNestableDelayedTask(from_here, task, 0);
+}
+
+bool SequencedTaskRunner::DeleteSoonInternal(
+    const tracked_objects::Location& from_here,
+    void(*deleter)(const void*),
+    const void* object) {
+  return PostNonNestableTask(from_here, Bind(deleter, object));
+}
+
+bool SequencedTaskRunner::ReleaseSoonInternal(
+    const tracked_objects::Location& from_here,
+    void(*releaser)(const void*),
+    const void* object) {
+  return PostNonNestableTask(from_here, Bind(releaser, object));
+}
+
+}  // namespace base