Move blink scheduler implementation into a component

components/scheduler/child/child_scheduler.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_CHILD_SCHEDULER_CHILD_SCHEDULER_H_
-#define CONTENT_CHILD_SCHEDULER_CHILD_SCHEDULER_H_
+#ifndef COMPONENTS_SCHEDULER_CHILD_CHILD_SCHEDULER_H_
+#define COMPONENTS_SCHEDULER_CHILD_CHILD_SCHEDULER_H_
 
 #include "base/message_loop/message_loop.h"
-#include "content/child/scheduler/single_thread_idle_task_runner.h"
-#include "content/common/content_export.h"
+#include "components/scheduler/child/single_thread_idle_task_runner.h"
+#include "components/scheduler/scheduler_export.h"
 
 namespace base {
 class MessageLoop;
 }
 
-namespace content {
+namespace scheduler {
 
-class CONTENT_EXPORT ChildScheduler {
+class SCHEDULER_EXPORT ChildScheduler {
  public:
-  virtual ~ChildScheduler() { }
+  virtual ~ChildScheduler() {}
 
   // Returns the default task runner.
   virtual scoped_refptr<base::SingleThreadTaskRunner> DefaultTaskRunner() = 0;
 
   // Returns the idle task runner. Tasks posted to this runner may be reordered
   // relative to other task types and may be starved for an arbitrarily long
   // time if no idle time is available.
   virtual scoped_refptr<SingleThreadIdleTaskRunner> IdleTaskRunner() = 0;
 
   // Returns true if there is high priority work pending on the main thread
@@ skipping 20 matching lines @@
       base::MessageLoop::TaskObserver* task_observer) = 0;
   virtual void RemoveTaskObserver(
       base::MessageLoop::TaskObserver* task_observer) = 0;
 
   // Shuts down the scheduler by dropping any remaining pending work in the work
   // queues. After this call any work posted to the task runners will be
   // silently dropped.
   virtual void Shutdown() = 0;
 
  protected:
-  ChildScheduler() { }
+  ChildScheduler() {}
   DISALLOW_COPY_AND_ASSIGN(ChildScheduler);
 };
 
-}  // namespace content
+}  // namespace scheduler
 
-#endif  // CONTENT_CHILD_SCHEDULER_CHILD_SCHEDULER_H_
+#endif  // COMPONENTS_SCHEDULER_CHILD_CHILD_SCHEDULER_H_