content: Add task queue manager

content/renderer/scheduler/task_queue_scheduler_default.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_SCHEDULER_DEFAULT_H_
+#define CONTENT_RENDERER_SCHEDULER_TASK_QUEUE_SCHEDULER_DEFAULT_H_
+
+#include "content/renderer/scheduler/task_queue_scheduler.h"
+
+namespace base {
+class TaskQueue;
+}
+
+namespace content {
+
+class TaskQueueSchedulerDefault : public TaskQueueScheduler {
+ public:
+  TaskQueueSchedulerDefault();
+  virtual ~TaskQueueSchedulerDefault();
+
+  virtual void DidQueueTask(TaskQueueManager::QueueId queue) override;
+  virtual void SetWorkQueues(
+      const std::vector<const base::TaskQueue*>& work_queues) override;
+  virtual bool ShouldReloadWorkQueue(TaskQueueManager::QueueId queue) override;
+  virtual bool ChooseWorkQueueToService(
+      TaskQueueManager::QueueId* out_queue) override;
+
+ private:
+  std::vector<const base::TaskQueue*> work_queues_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_RENDERER_SCHEDULER_TASK_QUEUE_SCHEDULER_DEFAULT_H_