Revert of Redirect the MessageLoop's task runner to the renderer scheduler

components/scheduler/child/scheduler_message_loop_delegate.cc

+// Copyright 2015 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/scheduler/child/scheduler_message_loop_delegate.h"
+
+namespace scheduler {
+
+// static
+scoped_refptr<SchedulerMessageLoopDelegate>
+SchedulerMessageLoopDelegate::Create(base::MessageLoop* message_loop) {
+  return make_scoped_refptr(new SchedulerMessageLoopDelegate(message_loop));
+}
+
+SchedulerMessageLoopDelegate::SchedulerMessageLoopDelegate(
+    base::MessageLoop* message_loop)
+    : message_loop_(message_loop) {
+}
+
+SchedulerMessageLoopDelegate::~SchedulerMessageLoopDelegate() {
+}
+
+bool SchedulerMessageLoopDelegate::PostDelayedTask(
+    const tracked_objects::Location& from_here,
+    const base::Closure& task,
+    base::TimeDelta delay) {
+  return message_loop_->task_runner()->PostDelayedTask(from_here, task, delay);
+}
+
+bool SchedulerMessageLoopDelegate::PostNonNestableDelayedTask(
+    const tracked_objects::Location& from_here,
+    const base::Closure& task,
+    base::TimeDelta delay) {
+  return message_loop_->task_runner()->PostNonNestableDelayedTask(from_here,
+                                                                  task, delay);
+}
+
+bool SchedulerMessageLoopDelegate::RunsTasksOnCurrentThread() const {
+  return message_loop_->task_runner()->RunsTasksOnCurrentThread();
+}
+
+bool SchedulerMessageLoopDelegate::IsNested() const {
+  return message_loop_->IsNested();
+}
+
+void SchedulerMessageLoopDelegate::AddTaskObserver(
+    base::MessageLoop::TaskObserver* task_observer) {
+  return message_loop_->AddTaskObserver(task_observer);
+}
+
+void SchedulerMessageLoopDelegate::RemoveTaskObserver(
+    base::MessageLoop::TaskObserver* task_observer) {
+  return message_loop_->RemoveTaskObserver(task_observer);
+}
+
+}  // namespace scheduler