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

components/scheduler/child/scheduler_task_runner_delegate.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_CHILD_SCHEDULER_TASK_RUNNER_DELEGATE_H_
 #define COMPONENTS_SCHEDULER_CHILD_SCHEDULER_TASK_RUNNER_DELEGATE_H_
 
 #include "base/message_loop/message_loop.h"
-#include "components/scheduler/base/nestable_single_thread_task_runner.h"
+#include "components/scheduler/base/task_queue_manager_delegate.h"
 #include "components/scheduler/scheduler_export.h"
 
 namespace scheduler {
 
 class SCHEDULER_EXPORT SchedulerTaskRunnerDelegate

[Sami, 2015/10/30 11:11:20]

Should this now be called SchedulerTaskQueueManagerDelegate? It's a bit wordy so
other suggestions are welcome too.

[alex clarke (OOO till 29th), 2015/10/30 12:12:24]

Done.

-    : public NestableSingleThreadTaskRunner {
+    : public TaskQueueManagerDelegate {
  public:
   SchedulerTaskRunnerDelegate() {}
 
   // If the underlying task runner supports the concept of a default task
   // runner, the delegate should implement this function to redirect that task
   // runner to the scheduler.
   virtual void SetDefaultTaskRunner(
       scoped_refptr<base::SingleThreadTaskRunner> task_runner) = 0;
 
   // Similarly this method can be used to restore the original task runner when
   // the scheduler no longer wants to intercept tasks.
   virtual void RestoreDefaultTaskRunner() = 0;
 
  protected:
   ~SchedulerTaskRunnerDelegate() override {}
 
   DISALLOW_COPY_AND_ASSIGN(SchedulerTaskRunnerDelegate);
 };
 
 }  // namespace scheduler
 
 #endif  // COMPONENTS_SCHEDULER_CHILD_SCHEDULER_TASK_RUNNER_DELEGATE_H_