Move blink scheduler implementation into a component

content/renderer/scheduler/webthread_impl_for_renderer_scheduler.h

 // 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.
 
 #ifndef CONTENT_RENDERER_SCHEDULER_WEBTHREAD_IMPL_FOR_RENDERER_SCHEDULER_H_
 #define CONTENT_RENDERER_SCHEDULER_WEBTHREAD_IMPL_FOR_RENDERER_SCHEDULER_H_
 
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "content/child/webthread_base.h"
 
 namespace blink {
 class WebScheduler;
 };
 
-namespace content {
-
+namespace scheduler {
 class RendererScheduler;
 class WebSchedulerImpl;
+}
+
+namespace content {
 
 class CONTENT_EXPORT WebThreadImplForRendererScheduler : public WebThreadBase {
  public:
-  explicit WebThreadImplForRendererScheduler(RendererScheduler* scheduler);
+  explicit WebThreadImplForRendererScheduler(
+      scheduler::RendererScheduler* scheduler);
   virtual ~WebThreadImplForRendererScheduler();
 
   // blink::WebThread implementation.
   blink::WebScheduler* scheduler() const;
   blink::PlatformThreadId threadId() const override;
 
   // WebThreadBase implementation.
   base::SingleThreadTaskRunner* TaskRunner() const override;
-  SingleThreadIdleTaskRunner* IdleTaskRunner() const override;
+  scheduler::SingleThreadIdleTaskRunner* IdleTaskRunner() const override;
 
  private:
   base::MessageLoop* MessageLoop() const override;
   void AddTaskObserverInternal(
       base::MessageLoop::TaskObserver* observer) override;
   void RemoveTaskObserverInternal(
       base::MessageLoop::TaskObserver* observer) override;
 
-  scoped_ptr<WebSchedulerImpl> web_scheduler_;
+  scoped_ptr<scheduler::WebSchedulerImpl> web_scheduler_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-  scoped_refptr<SingleThreadIdleTaskRunner> idle_task_runner_;
-  RendererScheduler* scheduler_;  // Not owned.
+  scoped_refptr<scheduler::SingleThreadIdleTaskRunner> idle_task_runner_;
+  scheduler::RendererScheduler* scheduler_;  // Not owned.
   blink::PlatformThreadId thread_id_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SCHEDULER_WEBTHREAD_IMPL_FOR_RENDERER_SCHEDULER_H_