CancelableTaskTracker::PostDelayedTask() support

base/task/cancelable_task_tracker_unittest.cc

 // Copyright 2014 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.
 
 #include "base/task/cancelable_task_tracker.h"
 
 #include <cstddef>
 #include <deque>
 
 #include "base/bind.h"
@@ skipping 412 matching lines @@
 
   bad_thread.message_loop_proxy()->PostTask(
       FROM_HERE,
       Bind(&MaybeRunDeadlyTaskTrackerMemberFunction,
            Unretained(&task_tracker_),
            Bind(&CancelableTaskTracker::TryCancelAll)));
 
   test_task_runner->RunUntilIdle();
 }
 
+TEST_F(CancelableTaskTrackerTest, PostDelayedTask) {
+  scoped_refptr<TestSimpleTaskRunner> test_task_runner(
+      new TestSimpleTaskRunner());
+
+  EXPECT_FALSE(task_tracker_.HasTrackedTasks());
+
+  EXPECT_NE(CancelableTaskTracker::kBadTaskId, task_tracker_.PostDelayedTask(
+      test_task_runner.get(),
+      FROM_HERE,
+      MakeExpectedRunClosure(FROM_HERE),
+      TimeDelta()));
+
+  EXPECT_NE(CancelableTaskTracker::kBadTaskId, task_tracker_.PostDelayedTask(
+      test_task_runner.get(),
+      FROM_HERE,
+      MakeExpectedRunClosure(FROM_HERE),
+      TimeDelta(TimeDelta::FromMilliseconds(1))));
+
+  test_task_runner->RunUntilIdle();
+
+  EXPECT_TRUE(task_tracker_.HasTrackedTasks());
+
+  RunCurrentLoopUntilIdle();
+
+  EXPECT_FALSE(task_tracker_.HasTrackedTasks());
+}
+
 }  // namespace base