Add functions to expand PostDelayedTask interface.

base/sequenced_task_runner.h

 // Copyright (c) 2012 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.
 
 #ifndef BASE_SEQUENCED_TASKRUNNER_H_
 #define BASE_SEQUENCED_TASKRUNNER_H_
 #pragma once
 
 #include "base/base_export.h"
 #include "base/sequenced_task_runner_helpers.h"
@@ skipping 98 matching lines @@
   // below.
 
   bool PostNonNestableTask(const tracked_objects::Location& from_here,
                            const Closure& task);
 
   virtual bool PostNonNestableDelayedTask(
       const tracked_objects::Location& from_here,
       const Closure& task,
       int64 delay_ms) = 0;
 
+  virtual bool PostNonNestableDelayedTask(
+      const tracked_objects::Location& from_here,
+      const Closure& task,
+      base::TimeDelta delay) = 0;
+
   // Submits a non-nestable task to delete the given object.  Returns
   // true if the object may be deleted at some point in the future,
   // and false if the object definitely will not be deleted.
   template <class T>
   bool DeleteSoon(const tracked_objects::Location& from_here,
                   const T* object) {
     return
         subtle::DeleteHelperInternal<T, bool>::DeleteViaSequencedTaskRunner(
             this, from_here, object);
   }
@@ skipping 18 matching lines @@
                           const void* object);
 
   bool ReleaseSoonInternal(const tracked_objects::Location& from_here,
                            void(*releaser)(const void*),
                            const void* object);
 };
 
 }  // namespace base
 
 #endif  // BASE_SEQUENCED_TASKRUNNER_H_