map.html">
<link rel="import" href="/tracing/value/histogram.html">

<script>
'use strict';

/**
 * Per-second metric is a set of page load metrics to show the different
 * activities happening in each second since navigation start. It categorizes
 * trace events into different categories (e.g., layout, style, gc) of
 * activities. For each kind of activities, this metric outputs a
 * single-value histogram to show how long each kind of activities run for
 * during each second.
 *
 * It also has the followi