Introduce a SchedulerHelper in content/child/scheduler

content/child/scheduler/task_queue_selector.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_TASK_QUEUE_SELECTOR_H_
-#define CONTENT_RENDERER_SCHEDULER_TASK_QUEUE_SELECTOR_H_
+#ifndef CONTENT_CHILD_SCHEDULER_TASK_QUEUE_SELECTOR_H_
+#define CONTENT_CHILD_SCHEDULER_TASK_QUEUE_SELECTOR_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 
 namespace base {
 class TaskQueue;
 namespace trace_event {
 class TracedValue;
 }  // namespace trace_event
@@ skipping 16 matching lines @@
   //
   // This function is called on the main thread.
   virtual bool SelectWorkQueueToService(size_t* out_queue_index) = 0;
 
   // Serialize the selector state for tracing.
   virtual void AsValueInto(base::trace_event::TracedValue* state) const = 0;
 };
 
 }  // namespace content
 
-#endif  // CONTENT_RENDERER_SCHEDULER_TASK_QUEUE_SELECTOR_H_
+#endif  // CONTENT_CHILD_SCHEDULER_TASK_QUEUE_SELECTOR_H_