Revert of Move throttling of background timers into the renderer scheduler

components/scheduler/renderer/web_frame_scheduler_impl.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 COMPONENTS_SCHEDULER_RENDERER_WEB_FRAME_SCHEDULER_IMPL_H_
 #define COMPONENTS_SCHEDULER_RENDERER_WEB_FRAME_SCHEDULER_IMPL_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 18 matching lines @@
                         WebViewSchedulerImpl* parent_web_view_scheduler);
 
   ~WebFrameSchedulerImpl() override;
 
   // blink::WebFrameScheduler implementation:
   void setFrameVisible(bool visible) override;
   blink::WebTaskRunner* loadingTaskRunner() override;
   blink::WebTaskRunner* timerTaskRunner() override;
   void setFrameOrigin(const blink::WebSecurityOrigin* origin) override;
 
-  void SetPageInBackground(bool page_in_background);
-
  private:
   friend class WebViewSchedulerImpl;
 
   void DetachFromWebViewScheduler();
-  void ApplyPolicyToTimerQueue();
 
   scoped_refptr<TaskQueue> loading_task_queue_;
   scoped_refptr<TaskQueue> timer_task_queue_;
   scoped_ptr<WebTaskRunnerImpl> loading_web_task_runner_;
   scoped_ptr<WebTaskRunnerImpl> timer_web_task_runner_;
   RendererSchedulerImpl* renderer_scheduler_;        // NOT OWNED
   WebViewSchedulerImpl* parent_web_view_scheduler_;  // NOT OWNED
   blink::WebSecurityOrigin origin_;
   bool visible_;
-  bool page_in_background_;
 
   DISALLOW_COPY_AND_ASSIGN(WebFrameSchedulerImpl);
 };
 
 }  // namespace scheduler
 
 #endif  // COMPONENTS_SCHEDULER_RENDERER_WEB_FRAME_SCHEDULER_IMPL_H_