Adding upstream version 115.8.0esr.upstream/115.8.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/testing/web-platform/tests/longtask-timing/resources/raflongtask.js b/testing/web-platform/tests/longtask-timing/resources/raflongtask.js
new file mode 100644
index 0000000000..ec39cb896e
--- /dev/null
+++ b/testing/web-platform/tests/longtask-timing/resources/raflongtask.js
@@ -0,0 +1,5 @@
+window.requestAnimationFrame(function() {
+  /* Generate a slow task. */
+  const begin = window.performance.now();
+  while (window.performance.now() < begin + 60);
+});