Move blink scheduler implementation into a component

content/renderer/scheduler/renderer_scheduler.cc

-// Copyright 2014 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/renderer/scheduler/renderer_scheduler.h"
-
-#include "base/command_line.h"
-#include "base/message_loop/message_loop.h"
-#include "base/trace_event/trace_event.h"
-#include "base/trace_event/trace_event_impl.h"
-#include "content/child/scheduler/scheduler_message_loop_delegate.h"
-#include "content/public/common/content_switches.h"
-#include "content/renderer/scheduler/null_renderer_scheduler.h"
-#include "content/renderer/scheduler/renderer_scheduler_impl.h"
-
-namespace content {
-
-RendererScheduler::RendererScheduler() {
-}
-
-RendererScheduler::~RendererScheduler() {
-}
-
-// static
-scoped_ptr<RendererScheduler> RendererScheduler::Create() {
-  // Ensure worker.scheduler appears as an option in about://tracing
-  base::trace_event::TraceLog::GetCategoryGroupEnabled(
-      TRACE_DISABLED_BY_DEFAULT("worker.scheduler"));
-
-  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
-  if (command_line->HasSwitch(switches::kDisableBlinkScheduler)) {
-    return make_scoped_ptr(new NullRendererScheduler());
-  } else {
-    base::MessageLoop* message_loop = base::MessageLoop::current();
-    return make_scoped_ptr(new RendererSchedulerImpl(
-        SchedulerMessageLoopDelegate::Create(message_loop)));
-  }
-}
-
-}  // namespace content