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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>
+ <script src="/common/get-host-info.sub.js"></script>
+</head>
+<body>
+ <script>
+ promise_test(async () => {
+ assert_implements(window.LargestContentfulPaint,
+ "LargestContentfulPaint is not implemented");
+ const beforeLoad = performance.now();
+ // 262 is the size of the animated PNG up until the first frame,
+ // including the chunk that starts the second frame (indicating that
+ //the first frame data is done).
+ const {REMOTE_ORIGIN} = get_host_info();
+ const url = REMOTE_ORIGIN +
+ '/images/anim-tao.png?pipe=trickle(262:d1)';
+ const entry = await load_and_observe(url);
+ // anim-gr.png 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>