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 27d057c84bcec276de4309c6b02fde7fa4e94a55..221be206919388a4db2a51cb5614287a99d42ad9 100644
--- a/third_party/WebKit/Source/core/dom/StyleEngine.cpp
+++ b/third_party/WebKit/Source/core/dom/StyleEngine.cpp
@@ -736,7 +736,7 @@ 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);
 }