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

components/scheduler/child/worker_scheduler.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/worker_scheduler.h"
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "components/scheduler/child/null_worker_scheduler.h"
-#include "components/scheduler/child/scheduler_task_runner_delegate_impl.h"
+#include "components/scheduler/child/scheduler_message_loop_delegate.h"
 #include "components/scheduler/child/worker_scheduler_impl.h"
 #include "components/scheduler/common/scheduler_switches.h"
 
 namespace scheduler {
 
 WorkerScheduler::WorkerScheduler() {
 }
 
 WorkerScheduler::~WorkerScheduler() {
 }
 
 // static
 scoped_ptr<WorkerScheduler> WorkerScheduler::Create(
     base::MessageLoop* message_loop) {
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(switches::kDisableBlinkScheduler)) {
     return make_scoped_ptr(new NullWorkerScheduler());
   } else {
     return make_scoped_ptr(new WorkerSchedulerImpl(
-        SchedulerTaskRunnerDelegateImpl::Create(message_loop)));
+        SchedulerMessageLoopDelegate::Create(message_loop)));
   }
 }
 
 }  // namespace scheduler