HTMLTableColElement span type set to unsigned

Source/core/html/HTMLTableColElement.cpp

 /*
  * 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 43 matching lines @@
 {
     if (name == widthAttr)
         addHTMLLengthToStyle(style, CSSPropertyWidth, value);
     else
         HTMLTablePartElement::collectStyleForPresentationAttribute(name, value, style);
 }
 
 void HTMLTableColElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
     if (name == spanAttr) {
-        int newSpan = 0;
-        if (value.isEmpty() || !parseHTMLInteger(value, newSpan) || newSpan < 1) {
+        unsigned newSpan = 0;
+        if (value.isEmpty() || !parseHTMLNonNegativeInteger(value, newSpan) || newSpan < 1) {
             // If the value of span is not a valid non-negative integer greater than zero,
             // set it to 1.
             newSpan = 1;
         }
         m_span = newSpan;
         if (layoutObject() && layoutObject()->isLayoutTableCol())
             layoutObject()->updateFromElement();
     } else if (name == widthAttr) {
         if (!value.isEmpty()) {
             if (layoutObject() && layoutObject()->isLayoutTableCol()) {
                 LayoutTableCol* col = toLayoutTableCol(layoutObject());
                 int newWidth = width().toInt();
                 if (newWidth != col->size().width())
                     col->setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation(LayoutInvalidationReason::AttributeChanged);
             }
         }
     } else
         HTMLTablePartElement::parseAttribute(name, value);
 }
 
 const StylePropertySet* HTMLTableColElement::additionalPresentationAttributeStyle()
 {
     if (!hasTagName(colgroupTag))
         return nullptr;
     if (HTMLTableElement* table = findParentTable())
         return table->additionalGroupStyle(false);
     return nullptr;
 }
 
-void HTMLTableColElement::setSpan(int n)
+void HTMLTableColElement::setSpan(unsigned n)
 {
-    setIntegralAttribute(spanAttr, n);
+    setUnsignedIntegralAttribute(spanAttr, n);
 }
 
 const AtomicString& HTMLTableColElement::width() const
 {
     return getAttribute(widthAttr);
 }
 
 }