Rename variables in ContainerNode::checkForSiblingStyleChanges() for clarity

Source/core/dom/ContainerNode.h

Index: Source/core/dom/ContainerNode.h
diff --git a/Source/core/dom/ContainerNode.h b/Source/core/dom/ContainerNode.h
index c43a52b6808ed8fe4553fae77cfed418b3144be5..d1585804fbe9c5f830234243a491773e16e63ffb 100644
--- a/Source/core/dom/ContainerNode.h
+++ b/Source/core/dom/ContainerNode.h
@@ -151,7 +151,7 @@ public:
     // since it's not clear that they alter the style bits of siblings and children.
     void checkForChildrenAdjacentRuleChanges();
     enum SiblingCheckType { FinishedParsingChildren, SiblingRemoved, Other };
-    void checkForSiblingStyleChanges(SiblingCheckType, Node* beforeChange, Node* afterChange);
+    void checkForSiblingStyleChanges(SiblingCheckType, Node* nodeBeforeChange, Node* nodeAfterChange);
 
     bool childrenSupportStyleSharing() const { return !hasRestyleFlags(); }