[content] Add support for Non nestable idle tasks the the RendererScheduler

content/renderer/scheduler/single_thread_idle_task_runner.h

 // 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.
 
 #ifndef CONTENT_RENDERER_SCHEDULER_SINGLE_THREAD_IDLE_TASK_RUNNER_H_
 #define CONTENT_RENDERER_SCHEDULER_SINGLE_THREAD_IDLE_TASK_RUNNER_H_
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
@@ skipping 12 matching lines @@
   typedef base::Callback<void(base::TimeTicks)> IdleTask;
 
   SingleThreadIdleTaskRunner(
       scoped_refptr<base::SingleThreadTaskRunner> idle_priority_task_runner,
       scoped_refptr<base::SingleThreadTaskRunner> after_wakeup_task_runner,
       base::Callback<void(base::TimeTicks*)> deadline_supplier);
 
   virtual void PostIdleTask(const tracked_objects::Location& from_here,
                             const IdleTask& idle_task);
 
+  virtual void PostNonNestableIdleTask(
+      const tracked_objects::Location& from_here,
+      const IdleTask& idle_task);
+
   virtual void PostIdleTaskAfterWakeup(
       const tracked_objects::Location& from_here,
       const IdleTask& idle_task);
 
   bool RunsTasksOnCurrentThread() const;
 
  protected:
   virtual ~SingleThreadIdleTaskRunner();
 
  private:
   friend class base::RefCountedThreadSafe<SingleThreadIdleTaskRunner>;
 
   void RunTask(IdleTask idle_task);
 
   scoped_refptr<base::SingleThreadTaskRunner> idle_priority_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> after_wakeup_task_runner_;
   base::Callback<void(base::TimeTicks*)> deadline_supplier_;
   DISALLOW_COPY_AND_ASSIGN(SingleThreadIdleTaskRunner);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SCHEDULER_SINGLE_THREAD_IDLE_TASK_RUNNER_H_