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<!DOCTYPE HTML>
<html>
<head>
<meta charset=utf-8>
<title>Largest Contentful Paint: observe image.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/largest-contentful-paint-helpers.js"></script>
</head>
<body>
<script>
promise_test(async () => {
assert_implements(window.LargestContentfulPaint,
"LargestContentfulPaint is not implemented");
const beforeLoad = performance.now();
// 136 is the size of the animated GIF up until the first frame.
// The trickle pipe delays the response after the first frame by 1 second.
const url = window.location.origin +
`/images/anim-gr.gif?pipe=trickle(136:d${delay_pipe_value})`;
const entry = await load_and_observe(url);
// anim-gr.gif is 100 by 50.
const size = 100 * 50;
checkImage(entry, url, 'image_id', size, beforeLoad, ["animated"]);
}, "Same origin animated image is observable and has a first frame.");
</script>
</body>
</html>
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