TaskScheduler: TimeDelta instead of TimeTicks in Task's constructor.

base/task_scheduler/task.h

Index: base/task_scheduler/task.h
diff --git a/base/task_scheduler/task.h b/base/task_scheduler/task.h
index dcdda00d45d186dc97a792b865b8ace726d0fcab..010b29d830adcacfad4408798c72abb61f2f6205 100644
--- a/base/task_scheduler/task.h
+++ b/base/task_scheduler/task.h
@@ -19,13 +19,12 @@ namespace internal {
 // profiling inherited from PendingTask.
 struct BASE_EXPORT Task : public PendingTask {
   // |posted_from| is the site the task was posted from. |task| is the closure
-  // to run. |traits| is metadata about the task. |delayed_run_time| is the time
-  // at which the task should be run (null TimeTicks if the task can run
-  // immediately).
+  // to run. |traits| is metadata about the task. |delay| is a delay that must
+  // expire before the Task runs.
   Task(const tracked_objects::Location& posted_from,
        const Closure& task,
        const TaskTraits& traits,
-       const TimeTicks& delayed_run_time);
+       const TimeDelta& delay);
   ~Task();
 
   // The TaskTraits of this task.