Web Animations: Fix pseudo element keyframe style resolution crash

LayoutTests/animations/pseudo-element-animation-with-marker-crash.html

Index: LayoutTests/animations/pseudo-element-animation-with-marker-crash.html
diff --git a/LayoutTests/animations/pseudo-element-animation-with-color-crash.html b/LayoutTests/animations/pseudo-element-animation-with-marker-crash.html
similarity index 54%
copy from LayoutTests/animations/pseudo-element-animation-with-color-crash.html
copy to LayoutTests/animations/pseudo-element-animation-with-marker-crash.html
index ce81c8388d9aadbbbf429bca80df4f13df2daffc..4b6736314887c463b04fd81e086f34dde8745e61 100644
--- a/LayoutTests/animations/pseudo-element-animation-with-color-crash.html
+++ b/LayoutTests/animations/pseudo-element-animation-with-marker-crash.html
@@ -1,9 +1,7 @@
 <style>
-@keyframes A { 0% { color: red; } }
-a:before, b:before { animation-name: A; }
+@keyframes test { 0% { marker: url("crash"); } }
+body:before { animation-name: test; }
 </style>
-<a href="#"><b></b></a>
-
 <script>
 if (window.testRunner)
     testRunner.dumpAsText();