| Index: Source/core/dom/Element.h
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| diff --git a/Source/core/dom/Element.h b/Source/core/dom/Element.h
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| index 8a92a302ae83de24bfae0496f44ba511faaf6753..9108c80d5cd96b47d07b24f6df75167c6c5f880d 100644
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| --- a/Source/core/dom/Element.h
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| +++ b/Source/core/dom/Element.h
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| @@ -292,6 +292,7 @@ public:
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|      };
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|  
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|      // This method is called whenever an attribute is added, changed or removed.
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| +    virtual void attributeWillChange(const QualifiedName&, const AtomicString&, const AtomicString&) { }
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|      virtual void attributeChanged(const QualifiedName&, const AtomicString&, AttributeModificationReason = ModifiedDirectly);
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|      virtual void parseAttribute(const QualifiedName&, const AtomicString&);
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|  
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| 
 |