Reschedule sibling invalidations as descendant on removal.

third_party/WebKit/Source/core/dom/StyleEngine.h

Index: third_party/WebKit/Source/core/dom/StyleEngine.h
diff --git a/third_party/WebKit/Source/core/dom/StyleEngine.h b/third_party/WebKit/Source/core/dom/StyleEngine.h
index 7f1027ba5413eac0bbfaf6b725b69ae07473f975..6bc62016917748a42b2ec8830f76fb7d59382fc3 100644
--- a/third_party/WebKit/Source/core/dom/StyleEngine.h
+++ b/third_party/WebKit/Source/core/dom/StyleEngine.h
@@ -240,6 +240,10 @@ class CORE_EXPORT StyleEngine final
   void scheduleInvalidationsForRuleSets(TreeScope&,
                                         const HeapHashSet<Member<RuleSet>>&);
 
+  void elementWillBeRemoved(Element& element) {
+    m_styleInvalidator.rescheduleSiblingInvalidationsAsDescendants(element);
+  }
+
   unsigned styleForElementCount() const { return m_styleForElementCount; }
   void incStyleForElementCount() { m_styleForElementCount++; }