Devirtualize offsetInCharacters

Source/core/dom/Node.h

Index: Source/core/dom/Node.h
diff --git a/Source/core/dom/Node.h b/Source/core/dom/Node.h
index c5abc31ec01f3f41501c1f6f87ed2e537a8e3c8f..ce184d2759dbc38613399c726f8c57ea865045a3 100644
--- a/Source/core/dom/Node.h
+++ b/Source/core/dom/Node.h
@@ -489,7 +489,7 @@ public:
     Node* commonAncestor(const Node&, Node* (*parent)(const Node&));
 
     // Used to determine whether range offsets use characters or node indices.
-    virtual bool offsetInCharacters() const;
+    bool offsetInCharacters() const;
     // Number of DOM 16-bit units contained in node. Note that rendered text length can be different - e.g. because of
     // css-transform:capitalize breaking up precomposed characters and ligatures.
     virtual int maxCharacterOffset() const;