diff -r 000000000000 -r 6474c204b198 ipc/chromium/src/base/worker_pool.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/chromium/src/base/worker_pool.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,24 @@
+// Copyright (c) 2006-2008 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_WORKER_POOL_H_
+#define BASE_WORKER_POOL_H_
+
+#include "base/tracked.h"
+
+class Task;
+
+// This is a facility that runs tasks that don't require a specific thread or
+// a message loop.
+class WorkerPool {
+ public:
+  // This function posts |task| to run on a worker thread.  |task_is_slow|
+  // should be used for tasks that will take a long time to execute.  Returns
+  // false if |task| could not be posted to a worker thread.  Regardless of
+  // return value, ownership of |task| is transferred to the worker pool.
+  static bool PostTask(const tracked_objects::Location& from_here,
+                       Task* task, bool task_is_slow);
+};
+
+#endif  // BASE_WORKER_POOL_H_