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diff --git a/media/mtransport/simpletokenbucket.h b/media/mtransport/simpletokenbucket.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Original author: bcampen@mozilla.com */
+
+/*
+ *  This file defines a dirt-simple token bucket class.
+ */
+
+#ifndef simpletokenbucket_h__
+#define simpletokenbucket_h__
+
+#include <stdint.h>
+
+#include "prinrval.h"
+
+#include "m_cpp_utils.h"
+
+namespace mozilla {
+
+class SimpleTokenBucket {
+  public:
+    /*
+     *  Create a SimpleTokenBucket with a given maximum size and
+     *  token replenishment rate.
+     *  (eg; if you want a maximum rate of 5 per second over a 7 second
+     *  period, call SimpleTokenBucket b(5*7, 5);)
+     */
+    SimpleTokenBucket(size_t bucket_size, size_t tokens_per_second);
+
+    /*
+     *  Attempt to acquire a number of tokens. If successful, returns
+     *  |num_tokens|, otherwise returns the number of tokens currently
+     *  in the bucket.
+     *  Note: To get the number of tokens in the bucket, pass something
+     *  like UINT32_MAX.
+     */
+    size_t getTokens(size_t num_tokens);
+
+  protected: // Allow testing to touch these.
+    uint64_t max_tokens_;
+    uint64_t num_tokens_;
+    size_t tokens_per_second_;
+    PRIntervalTime last_time_tokens_added_;
+
+    DISALLOW_COPY_ASSIGN(SimpleTokenBucket);
+};
+
+} // namespace mozilla
+
+#endif // simpletokenbucket_h__
+