| Index: Source/core/html/HTMLButtonElement.h
 | 
| diff --git a/Source/core/html/HTMLButtonElement.h b/Source/core/html/HTMLButtonElement.h
 | 
| index 73a40f2795c6c1df35f626fa50e6b185c210e661..ed30a58aa31815c00d5d95d0e5cc333afbd08b69 100644
 | 
| --- a/Source/core/html/HTMLButtonElement.h
 | 
| +++ b/Source/core/html/HTMLButtonElement.h
 | 
| @@ -51,6 +51,7 @@ private:
 | 
|      virtual bool alwaysCreateUserAgentShadowRoot() const OVERRIDE { return false; }
 | 
|  
 | 
|      virtual Node::InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
 | 
| +    virtual void attributeWillChange(const QualifiedName&, const AtomicString&, const AtomicString&) OVERRIDE;
 | 
|      virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
 | 
|      virtual bool isPresentationAttribute(const QualifiedName&) const OVERRIDE;
 | 
|      virtual void defaultEventHandler(Event*) OVERRIDE;
 | 
| 
 |