Add base::PostDelayedTask(WithTraits).

base/task_scheduler/post_task.cc

Index: base/task_scheduler/post_task.cc
diff --git a/base/task_scheduler/post_task.cc b/base/task_scheduler/post_task.cc
index 737a219c26039b5e28bef8661e9f74538e1ff2af..8c3e941a303a9c874123327d470c6f1853101999 100644
--- a/base/task_scheduler/post_task.cc
+++ b/base/task_scheduler/post_task.cc
@@ -30,7 +30,13 @@ class PostTaskAndReplyTaskRunner : public internal::PostTaskAndReplyImpl {
 }  // namespace
 
 void PostTask(const tracked_objects::Location& from_here, const Closure& task) {
-  PostTaskWithTraits(from_here, TaskTraits(), task);
+  PostDelayedTask(from_here, task, TimeDelta());
+}
+
+void PostDelayedTask(const tracked_objects::Location& from_here,
+                     const Closure& task,
+                     TimeDelta delay) {
+  PostDelayedTaskWithTraits(from_here, TaskTraits(), task, delay);
 }
 
 void PostTaskAndReply(const tracked_objects::Location& from_here,
@@ -42,7 +48,15 @@ void PostTaskAndReply(const tracked_objects::Location& from_here,
 void PostTaskWithTraits(const tracked_objects::Location& from_here,
                         const TaskTraits& traits,
                         const Closure& task) {
-  TaskScheduler::GetInstance()->PostTaskWithTraits(from_here, traits, task);
+  PostDelayedTaskWithTraits(from_here, traits, task, TimeDelta());
+}
+
+void PostDelayedTaskWithTraits(const tracked_objects::Location& from_here,
+                               const TaskTraits& traits,
+                               const Closure& task,
+                               TimeDelta delay) {
+  TaskScheduler::GetInstance()->PostDelayedTaskWithTraits(from_here, traits,
+                                                          task, delay);
 }
 
 void PostTaskWithTraitsAndReply(const tracked_objects::Location& from_here,