1 files changed, 18 insertions, 0 deletions
diff --git a/dom/animation/test/chrome/file_animate_xrays.html b/dom/animation/test/chrome/file_animate_xrays.html
new file mode 100644
index 0000000000..2fa15b1764
--- /dev/null
+++ b/dom/animation/test/chrome/file_animate_xrays.html
@@ -0,0 +1,18 @@
+<!doctype html>
+<html>
+<head>
+<meta charset=utf-8>
+<script>
+Element.prototype.animate = function() {
+  throw 'Called animate() as defined in content document';
+}
+for (let name of ["KeyframeEffect", "Animation"]) {
+  this[name] = function() {
+    throw `Called overridden ${name} constructor`;
+  };
+}
+</script>
+<body>
+<div id="target"></div>
+</body>
+</html>