CancelableTaskTracker::PostDelayedTask() support

base/threading/worker_pool.cc

 // 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.
 
 #include "base/threading/worker_pool.h"
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/debug/leak_annotations.h"
 #include "base/lazy_instance.h"
@@ skipping 10 matching lines @@
   explicit PostTaskAndReplyWorkerPool(bool task_is_slow)
       : task_is_slow_(task_is_slow) {
   }
 
  private:
   bool PostTask(const tracked_objects::Location& from_here,
                 const Closure& task) override {
     return WorkerPool::PostTask(from_here, task, task_is_slow_);
   }
 
+  bool PostDelayedTask(
+      const tracked_objects::Location& from_here,
+      const Closure& task,
+      const TimeDelta& delay) override {
+    DLOG(ERROR) << "PostDelayedTask is not supported in WorkerPool.";
+    return false;
+  }
+
   bool task_is_slow_;
 };
 
 // WorkerPoolTaskRunner ---------------------------------------------
 // A TaskRunner which posts tasks to a WorkerPool with a
 // fixed ShutdownBehavior.
 //
 // Note that this class is RefCountedThreadSafe (inherited from TaskRunner).
 class WorkerPoolTaskRunner : public TaskRunner {
  public:
@@ skipping 74 matching lines @@
       from_here, task, reply);
 }
 
 // static
 const scoped_refptr<TaskRunner>&
 WorkerPool::GetTaskRunner(bool tasks_are_slow) {
   return g_taskrunners.Get().taskrunners_[tasks_are_slow];
 }
 
 }  // namespace base