Revert of Add a WorkerScheduler and a WebThreadImplForWorker

content/child/scheduler/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 "content/child/scheduler/worker_scheduler.h"
-
-#include "base/command_line.h"
-#include "base/message_loop/message_loop.h"
-#include "content/child/scheduler/null_worker_scheduler.h"
-#include "content/child/scheduler/scheduler_message_loop_delegate.h"
-#include "content/child/scheduler/worker_scheduler_impl.h"
-#include "content/public/common/content_switches.h"
-
-namespace content {
-
-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(
-        SchedulerMessageLoopDelegate::Create(message_loop)));
-  }
-}
-
-}  // namespace content