CancelableTaskTracker::PostDelayedTask() support

base/threading/worker_pool.cc

Index: base/threading/worker_pool.cc
diff --git a/base/threading/worker_pool.cc b/base/threading/worker_pool.cc
index bc016cec0d9d29bd492a0a9b6ea285c92e8459c6..bb8dcfae9a18847bcf93896de10466331725d82b 100644
--- a/base/threading/worker_pool.cc
+++ b/base/threading/worker_pool.cc
@@ -28,6 +28,14 @@ class PostTaskAndReplyWorkerPool : public internal::PostTaskAndReplyImpl {
     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_;
 };