diff -r 000000000000 -r 6474c204b198 security/sandbox/chromium/base/pending_task.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/sandbox/chromium/base/pending_task.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,60 @@
+// Copyright (c) 2011 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 PENDING_TASK_H_
+#define PENDING_TASK_H_
+
+#include <queue>
+
+#include "base/base_export.h"
+#include "base/callback.h"
+#include "base/location.h"
+#include "base/time/time.h"
+#include "base/tracking_info.h"
+
+namespace base {
+
+// Contains data about a pending task. Stored in TaskQueue and DelayedTaskQueue
+// for use by classes that queue and execute tasks.
+struct BASE_EXPORT PendingTask : public TrackingInfo {
+#if _MSC_VER >= 1700
+  PendingTask();
+#endif
+  PendingTask(const tracked_objects::Location& posted_from,
+              const Closure& task);
+  PendingTask(const tracked_objects::Location& posted_from,
+              const Closure& task,
+              TimeTicks delayed_run_time,
+              bool nestable);
+  ~PendingTask();
+
+  // Used to support sorting.
+  bool operator<(const PendingTask& other) const;
+
+  // The task to run.
+  Closure task;
+
+  // The site this PendingTask was posted from.
+  tracked_objects::Location posted_from;
+
+  // Secondary sort key for run time.
+  int sequence_num;
+
+  // OK to dispatch from a nested loop.
+  bool nestable;
+};
+
+// Wrapper around std::queue specialized for PendingTask which adds a Swap
+// helper method.
+class BASE_EXPORT TaskQueue : public std::queue<PendingTask> {
+ public:
+  void Swap(TaskQueue* queue);
+};
+
+// PendingTasks are sorted by their |delayed_run_time| property.
+typedef std::priority_queue<base::PendingTask> DelayedTaskQueue;
+
+}  // namespace base
+
+#endif  // PENDING_TASK_H_