Task Scheduler.

base/task_scheduler/task_scheduler.cc

Index: base/task_scheduler/task_scheduler.cc
diff --git a/base/task_scheduler/task_scheduler.cc b/base/task_scheduler/task_scheduler.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b6485d9439c390b7e4b8ab712ab92c7628f38150
--- /dev/null
+++ b/base/task_scheduler/task_scheduler.cc
@@ -0,0 +1,34 @@
+// Copyright 2016 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/task_scheduler/task_scheduler.h"
+
+#include "base/logging.h"
+
+namespace base {
+
+namespace {
+
+// |g_task_scheduler| is intentionally leaked on shutdown.
+TaskScheduler* g_task_scheduler = nullptr;
+
+}  // namespace
+
+// static
+void TaskScheduler::SetInstance(scoped_ptr<TaskScheduler> task_scheduler) {
+  DCHECK(!g_task_scheduler);
+  g_task_scheduler = task_scheduler.release();
+}
+
+// static
+TaskScheduler* TaskScheduler::GetInstance() {
+  return g_task_scheduler;
+}
+
+// static
+void TaskScheduler::InitializeDefaultTaskScheduler() {
+  NOTIMPLEMENTED();
+}
+
+}  // namespace base