CancelableTaskTracker::PostDelayedTask() support

base/task/cancelable_task_tracker.h

 // 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.
 
 // CancelableTaskTracker posts tasks (in the form of a Closure) to a
 // TaskRunner, and is able to cancel the task later if it's not needed
 // anymore.  On destruction, CancelableTaskTracker will cancel all
 // tracked tasks.
 //
 // Each cancelable task can be associated with a reply (also a Closure). After
@@ skipping 25 matching lines @@
 #ifndef BASE_TASK_CANCELABLE_TASK_TRACKER_H_
 #define BASE_TASK_CANCELABLE_TASK_TRACKER_H_
 
 #include "base/base_export.h"
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/weak_ptr.h"
 #include "base/task_runner_util.h"
 #include "base/threading/thread_checker.h"
+#include "base/time/time.h"
 
 namespace tracked_objects {
 class Location;
 }  // namespace tracked_objects
 
 namespace base {
 
 class CancellationFlag;
 class TaskRunner;
 
 class BASE_EXPORT CancelableTaskTracker {
  public:
   // All values except kBadTaskId are valid.
   typedef int64 TaskId;
   static const TaskId kBadTaskId;
 
   typedef base::Callback<bool()> IsCanceledCallback;
 
   CancelableTaskTracker();
 
   // Cancels all tracked tasks.
   ~CancelableTaskTracker();
 
   TaskId PostTask(base::TaskRunner* task_runner,
                   const tracked_objects::Location& from_here,
                   const base::Closure& task);
 
+  TaskId PostDelayedTask(base::TaskRunner* task_runner,
+                         const tracked_objects::Location& from_here,
+                         const base::Closure& task,
+                         const TimeDelta& delay);
+
   TaskId PostTaskAndReply(base::TaskRunner* task_runner,
                           const tracked_objects::Location& from_here,
                           const base::Closure& task,
                           const base::Closure& reply);
 
   template <typename TaskReturnType, typename ReplyArgType>
   TaskId PostTaskAndReplyWithResult(
       base::TaskRunner* task_runner,
       const tracked_objects::Location& from_here,
       const base::Callback<TaskReturnType(void)>& task,
@@ skipping 34 matching lines @@
   // noops.
   void TryCancelAll();
 
   // Returns true iff there are in-flight tasks that are still being
   // tracked.
   bool HasTrackedTasks() const;
 
  private:
   void Track(TaskId id, base::CancellationFlag* flag);
   void Untrack(TaskId id);
+  TaskId PostDelayedTaskAndReply(base::TaskRunner* task_runner,
+                                 const tracked_objects::Location& from_here,
+                                 const base::Closure& task,
+                                 const base::Closure& reply,
+                                 const TimeDelta& delay);
 
   base::hash_map<TaskId, base::CancellationFlag*> task_flags_;
 
   TaskId next_id_;
   base::ThreadChecker thread_checker_;
 
   base::WeakPtrFactory<CancelableTaskTracker> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CancelableTaskTracker);
 };
 
 }  // namespace base
 
 #endif  // BASE_TASK_CANCELABLE_TASK_TRACKER_H_