<!DOCTYPE html>
<!--
Copyright (c) 2012 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.
-->

<link rel="import" href="/tracing/base/base.html">

<script>
'use strict';

tr.exportTo('tr.model', function() {
  return {
    // Since the PID of the browser process is not known to the child processes,
    // we let them use "pid_ref = -1" to reference an object created in the
    // browser process.
    BROWSER_PROCESS_P