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+<!DOCTYPE HTML>
+<html>
+<head onload>
+<meta charset="utf-8" />
+<title>This test validates increasing the buffer size in onresourcetimingbufferfull callback of resource timing.</title>
+<link rel="author" title="Google" href="http://www.google.com/" />
+<link rel="help" href="https://www.w3.org/TR/resource-timing-2/#dom-performance-onresourcetimingbufferfull"/>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/resource-loaders.js"></script>
+<script src="resources/buffer-full-utilities.js"></script>
+</head>
+<body>
+<script>
+promise_test(async () => {
+ await fillUpTheBufferWithSingleResource();
+ performance.addEventListener('resourcetimingbufferfull', () => {
+ performance.setResourceTimingBufferSize(2);
+ });
+ await load.script(scriptResources[1]);
+ await bufferFullFirePromise;
+ checkEntries(2);
+}, "Test that increasing the buffer during the callback is enough for entries not to be dropped");
+</script>
+</body>
+</html>