CSS: will-change offset-path establishes a stacking context

third_party/WebKit/LayoutTests/transforms/containing-block.html

Index: third_party/WebKit/LayoutTests/transforms/containing-block.html
diff --git a/third_party/WebKit/LayoutTests/transforms/containing-block.html b/third_party/WebKit/LayoutTests/transforms/containing-block.html
index 56078de78da98e3dc2230469566bd2a41459413b..a67ddcb5766732d1ec5d958dc29ca52322609b95 100644
--- a/third_party/WebKit/LayoutTests/transforms/containing-block.html
+++ b/third_party/WebKit/LayoutTests/transforms/containing-block.html
@@ -49,4 +49,18 @@ test(function() {
 test(function() {
     assert_true(generatesContainingBlock('will-change', 'rotate'));
 }, "will-change: rotate establishes containing block");
+
+test(function() {
+    assert_true(generatesContainingBlock('offset-position', '50% 50%'));
+}, "offset-position establishes containing block");
+test(function() {
+    assert_true(generatesContainingBlock('will-change', 'offset-position'));
+}, "will-change: offset-position establishes containing block");
+
+test(function() {
+    assert_true(generatesContainingBlock('offset-path', 'path("m 100 0")'));
+}, "offset-path establishes containing block");
+test(function() {
+    assert_true(generatesContainingBlock('will-change', 'offset-path'));
+}, "will-change: offset-path establishes containing block");
 </script>