Adds a flag to support "Virtual Time" to the blink scheduler

components/scheduler/base/task_queue_manager_delegate_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 COMPONENTS_SCHEDULER_BASE_TASK_QUEUE_MANAGER_DELEGATE_FOR_TEST_H_
+#define COMPONENTS_SCHEDULER_BASE_TASK_QUEUE_MANAGER_DELEGATE_FOR_TEST_H_
+
+#include "base/macros.h"
+#include "base/time/tick_clock.h"
+#include "components/scheduler/base/task_queue_manager_delegate.h"
+
+namespace scheduler {
+
+class TaskQueueManagerDelegateForTest : public TaskQueueManagerDelegate {
+ public:
+  static scoped_refptr<TaskQueueManagerDelegateForTest> Create(
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+      scoped_ptr<base::TickClock> time_source);
+
+  // NestableSingleThreadTaskRunner implementation
+  bool PostDelayedTask(const tracked_objects::Location& from_here,
+                       const base::Closure& task,
+                       base::TimeDelta delay) override;
+  bool PostNonNestableDelayedTask(const tracked_objects::Location& from_here,
+                                  const base::Closure& task,
+                                  base::TimeDelta delay) override;
+  bool RunsTasksOnCurrentThread() const override;
+  bool IsNested() const override;
+  base::TimeTicks NowTicks() override;
+  void OnNoMoreImmediateWork() override;
+
+ protected:
+  ~TaskQueueManagerDelegateForTest() override;
+  TaskQueueManagerDelegateForTest(
+      scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+      scoped_ptr<base::TickClock> time_source);
+
+ private:
+  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+  scoped_ptr<base::TickClock> time_source_;
+
+  DISALLOW_COPY_AND_ASSIGN(TaskQueueManagerDelegateForTest);
+};
+
+}  // namespace scheduler
+
+#endif  // COMPONENTS_SCHEDULER_BASE_TASK_QUEUE_MANAGER_DELEGATE_FOR_TEST_H_