Missing sibling invalidation across removed element.

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

Index: third_party/WebKit/Source/core/dom/StyleEngine.cpp
diff --git a/third_party/WebKit/Source/core/dom/StyleEngine.cpp b/third_party/WebKit/Source/core/dom/StyleEngine.cpp
index 61626ccd83cb7d8204f622796cb8f3fe303e7548..c19ca69998809a5f109748fc23b99429542a7d63 100644
--- a/third_party/WebKit/Source/core/dom/StyleEngine.cpp
+++ b/third_party/WebKit/Source/core/dom/StyleEngine.cpp
@@ -739,7 +739,7 @@ void StyleEngine::scheduleInvalidationsForRemovedSibling(Element* beforeElement,
 
     scheduleSiblingInvalidationsForElement(removedElement, *schedulingParent, 1);
 
-    for (unsigned i = 2; beforeElement && i <= affectedSiblings; i++, beforeElement = ElementTraversal::previousSibling(*beforeElement))
+    for (unsigned i = 1; beforeElement && i <= affectedSiblings; i++, beforeElement = ElementTraversal::previousSibling(*beforeElement))
         scheduleSiblingInvalidationsForElement(*beforeElement, *schedulingParent, i);
 }