Missing sibling invalidation across removed element.

third_party/WebKit/LayoutTests/fast/css/invalidation/sibling-mutation-min-direct.html

Index: third_party/WebKit/LayoutTests/fast/css/invalidation/sibling-mutation-min-direct.html
diff --git a/third_party/WebKit/LayoutTests/fast/css/invalidation/sibling-mutation-min-direct.html b/third_party/WebKit/LayoutTests/fast/css/invalidation/sibling-mutation-min-direct.html
index ec5d1baa032a946f7eb048e69b7d238ec14c8979..47bd7752a6e2d808aba57b6b09195e4882e86e8f 100644
--- a/third_party/WebKit/LayoutTests/fast/css/invalidation/sibling-mutation-min-direct.html
+++ b/third_party/WebKit/LayoutTests/fast/css/invalidation/sibling-mutation-min-direct.html
@@ -5,8 +5,8 @@
     /* Dummy rule for increasing max-direct-adjacent */
     .x + .x + .x + .x { color: red }
 
-    span { color: green }
-    .a + .d, .b + .c { color: red }
+    span, .p + .r { color: green }
+    .a + .d, .b + .c, .r { color: red }
 </style>
 <div id="insertTest">
     <span class="a"></span>
@@ -16,10 +16,16 @@
 </div>
 <div id="removeTest">
     <span class="a"></span>
+    <span class="a2"></span>
     <span class="b"></span>
     <span class="c"></span>
     <span class="d"></span>
 </div>
+<div id="removeTest2">
+    <span class="p"></span>
+    <span class="q"></span>
+    <span class="r"></span>
+</div>
 <script>
     test(() =>
         assert_not_equals(window.internals, undefined, "Check that window.internals is defined.")
@@ -44,4 +50,14 @@
         assert_equals(internals.updateStyleAndReturnAffectedElementCount(), 1, "Recalc for .c.");
         assert_equals(getComputedStyle(c).color, "rgb(0, 128, 0)", "Check that .c is green after .b is removed.");
     }, "Check that we don't invalidate too much on sibling removal.");
+
+    test(() => {
+        var r = removeTest2.querySelector(".r");
+        assert_equals(getComputedStyle(r).color, "rgb(255, 0, 0)", "Check that .r is initially red.");
+
+        removeTest2.querySelector(".q").remove();
+
+        assert_equals(internals.updateStyleAndReturnAffectedElementCount(), 1, "Recalc for .r");
+        assert_equals(getComputedStyle(r).color, "rgb(0, 128, 0)", "Check that .r is green after .q is removed.");
+    }, "Check that we don't invalidate past removed element for sibling removal.");
 </script>