Avoid SVG viewport bug for CSS length animations that don't use viewport units

third_party/WebKit/LayoutTests/svg/animations/img-tag-css-length-animation-crash.html

Index: third_party/WebKit/LayoutTests/svg/animations/img-tag-css-length-animation-crash.html
diff --git a/third_party/WebKit/LayoutTests/svg/animations/img-tag-css-length-animation-crash.html b/third_party/WebKit/LayoutTests/svg/animations/img-tag-css-length-animation-crash.html
new file mode 100644
index 0000000000000000000000000000000000000000..3d315fc79685475330b75b7aba1a8c4c5b47b039
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/svg/animations/img-tag-css-length-animation-crash.html
@@ -0,0 +1,6 @@
+<script src="../../resources/testharness.js"></script>
+<script src="../../resources/testharnessreport.js"></script>
+<img src="data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg'><style>@keyframes test {from {left: 1px;} to {left: 1px}} rect {animation: test 1s infinite;}</style><rect></rect></svg>">
+<script>
+test(() => {}, 'Do not crash when animating CSS lengths inside an SVG image document.');
+</script>