Introduce a SchedulerHelper in content/child/scheduler

content/child/scheduler/nestable_task_runner_for_test.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_NESTABLE_TASK_RUNNER_FOR_TEST_H_
 #define CONTENT_RENDERER_SCHEDULER_NESTABLE_TASK_RUNNER_FOR_TEST_H_
 
-#include "content/renderer/scheduler/nestable_single_thread_task_runner.h"
+#include "content/child/scheduler/nestable_single_thread_task_runner.h"
 
 namespace content {
 
 class NestableTaskRunnerForTest : public NestableSingleThreadTaskRunner {
  public:
   static scoped_refptr<NestableTaskRunnerForTest> Create(
       scoped_refptr<base::SingleThreadTaskRunner> task_runner);
 
   void SetNested(bool is_nested);
 
@@ skipping 16 matching lines @@
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   bool is_nested_;
 
   DISALLOW_COPY_AND_ASSIGN(NestableTaskRunnerForTest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_SCHEDULER_NESTABLE_TASK_RUNNER_FOR_TEST_H_