diff -r 000000000000 -r 6474c204b198 ipc/chromium/src/chrome/common/task_queue.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ipc/chromium/src/chrome/common/task_queue.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,42 @@
+// 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 CHROME_COMMON_TASK_QUEUE_H__
+#define CHROME_COMMON_TASK_QUEUE_H__
+
+#include <deque>
+
+#include "base/task.h"
+
+// A TaskQueue is a queue of tasks waiting to be run.  To run the tasks, call
+// the Run method.  A task queue is itself a Task so that it can be placed in a
+// message loop or another task queue.
+class TaskQueue : public Task {
+ public:
+  TaskQueue();
+  ~TaskQueue();
+
+  // Run all the tasks in the queue.  New tasks pushed onto the queue during
+  // a run will be run next time |Run| is called.
+  virtual void Run();
+
+  // Push the specified task onto the queue.  When the queue is run, the tasks
+  // will be run in the order they are pushed.
+  //
+  // This method takes ownership of |task| and will delete task after it is run
+  // (or when the TaskQueue is destroyed, if we never got a chance to run it).
+  void Push(Task* task);
+
+  // Remove all tasks from the queue.  The tasks are deleted.
+  void Clear();
+
+  // Returns true if this queue contains no tasks.
+  bool Empty() const;
+
+ private:
+   // The list of tasks we are waiting to run.
+   std::deque<Task*> queue_;
+};
+
+#endif  // CHROME_COMMON_TASK_QUEUE_H__