CancelableTaskTracker::PostDelayedTask() support

base/task_runner.cc

Index: base/task_runner.cc
diff --git a/base/task_runner.cc b/base/task_runner.cc
index 262e1f8b09eac8d9f91b4113ddeccc27a33323ad..87867bc1d6941853cc69c0b23d70a98b61eb7def 100644
--- a/base/task_runner.cc
+++ b/base/task_runner.cc
@@ -53,6 +53,15 @@ bool TaskRunner::PostTaskAndReply(
       from_here, task, reply);
 }
 
+bool TaskRunner::PostDelayedTaskAndReply(
+    const tracked_objects::Location& from_here,
+    const Closure& task,
+    const Closure& reply,
+    TimeDelta delay) {
+  return PostTaskAndReplyTaskRunner(this).PostDelayedTaskAndReply(
+      from_here, task, reply, delay);
+}
+
 TaskRunner::TaskRunner() {}
 
 TaskRunner::~TaskRunner() {}