Move blink scheduler implementation into a component

components/scheduler/renderer/deadline_task_runner.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_DEADLINE_TASK_RUNNER_H_
-#define CONTENT_RENDERER_SCHEDULER_DEADLINE_TASK_RUNNER_H_
+#ifndef COMPONENTS_SCHEDULER_RENDERER_DEADLINE_TASK_RUNNER_H_
+#define COMPONENTS_SCHEDULER_RENDERER_DEADLINE_TASK_RUNNER_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "base/time/time.h"
-#include "content/child/scheduler/cancelable_closure_holder.h"
-#include "content/common/content_export.h"
+#include "components/scheduler/child/cancelable_closure_holder.h"
+#include "components/scheduler/scheduler_export.h"
 
-namespace content {
+namespace scheduler {
 
 // Runs a posted task at latest by a given deadline, but possibly sooner.
-class CONTENT_EXPORT DeadlineTaskRunner {
+class SCHEDULER_EXPORT DeadlineTaskRunner {
  public:
   DeadlineTaskRunner(const base::Closure& callback,
                      scoped_refptr<base::SingleThreadTaskRunner> task_runner);
 
   ~DeadlineTaskRunner();
 
   // If there is no outstanding task then a task is posted to run after |delay|.
   // If there is an outstanding task which is scheduled to run:
   //   a) sooner - then this is a NOP.
   //   b) later - then the outstanding task is cancelled and a new task is
   //              posted to run after |delay|.
   //
   // Once the deadline task has run, we reset.
   void SetDeadline(const tracked_objects::Location& from_here,
                    base::TimeDelta delay,
                    base::TimeTicks now);
 
  private:
   void RunInternal();
 
   CancelableClosureHolder cancelable_run_internal_;
   base::Closure callback_;
   base::TimeTicks deadline_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(DeadlineTaskRunner);
 };
 
-}  // namespace content
+}  // namespace scheduler
 
-#endif  // CONTENT_RENDERER_SCHEDULER_DEADLINE_TASK_RUNNER_H_
+#endif  // COMPONENTS_SCHEDULER_RENDERER_DEADLINE_TASK_RUNNER_H_