HTMLTableColElement span type set to unsigned

Source/core/html/HTMLTableColElement.h

 /*
  * Copyright (C) 1997 Martin Jones (mjones@kde.org)
  *           (C) 1997 Torben Weis (weis@kde.org)
  *           (C) 1998 Waldo Bastian (bastian@kde.org)
  *           (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 17 matching lines @@
 
 #include "core/html/HTMLTablePartElement.h"
 
 namespace blink {
 
 class HTMLTableColElement final : public HTMLTablePartElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
     DECLARE_ELEMENT_FACTORY_WITH_TAGNAME(HTMLTableColElement);
 
-    int span() const { return m_span; }
-    void setSpan(int);
+    unsigned span() const { return m_span; }
+    void setSpan(unsigned);
 
     const AtomicString& width() const;
 
 private:
     HTMLTableColElement(const QualifiedName& tagName, Document&);
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
     virtual bool isPresentationAttribute(const QualifiedName&) const override;
     virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) override;
     virtual const StylePropertySet* additionalPresentationAttributeStyle() override;
 
-    int m_span;
+    unsigned m_span;
 };
 
 inline bool isHTMLTableColElement(const HTMLElement& element)
 {
     return element.hasTagName(HTMLNames::colTag) || element.hasTagName(HTMLNames::colgroupTag);
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLTableColElement);
 
 } // namespace blink
 
 #endif // HTMLTableColElement_h