Add skeleton circular queue file.

base/containers/queue.h

+// Copyright 2017 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_CONTAINERS_QUEUE_H_
+#define BASE_CONTAINERS_QUEUE_H_
+
+#include <queue>
+
+#include "base/containers/circular_deque.h"
+
+namespace base {
+
+// Provides a definition of base::queue that's like std::queue but uses a
+// base::circular_queue instead. Since std::queue is just a wraper for an
+// underlying type, we can just provide a typedef for it that defaults to the
+// base circular_deque.
+template <class T, class Container = circular_deque<T>>
+using queue = std::queue<T, Container>;
+
+}  // namespace base
+
+#endif  // BASE_CONTAINERS_QUEUE_H_