Make cols/rows/span not accept zero when set from idl

third_party/WebKit/Source/core/html/HTMLTextAreaElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 608 matching lines @@
 bool HTMLTextAreaElement::isValidValue(const String& candidate) const {
   return !valueMissing(&candidate) && !tooLong(&candidate, IgnoreDirtyFlag) &&
          !tooShort(&candidate, IgnoreDirtyFlag);
 }
 
 void HTMLTextAreaElement::accessKeyAction(bool) {
   focus();
 }
 
 void HTMLTextAreaElement::setCols(unsigned cols) {
-  setUnsignedIntegralAttribute(colsAttr, cols);
+  setUnsignedIntegralAttribute(colsAttr, cols ? cols : defaultCols);
 }
 
 void HTMLTextAreaElement::setRows(unsigned rows) {
-  setUnsignedIntegralAttribute(rowsAttr, rows);
+  setUnsignedIntegralAttribute(rowsAttr, rows ? rows : defaultRows);
 }
 
 bool HTMLTextAreaElement::matchesReadOnlyPseudoClass() const {
   return isReadOnly();
 }
 
 bool HTMLTextAreaElement::matchesReadWritePseudoClass() const {
   return !isReadOnly();
 }
 
@@ skipping 38 matching lines @@
 void HTMLTextAreaElement::copyNonAttributePropertiesFromElement(
     const Element& source) {
   const HTMLTextAreaElement& sourceElement =
       static_cast<const HTMLTextAreaElement&>(source);
   setValueCommon(sourceElement.value(), DispatchNoEvent, SetSeletion);
   m_isDirty = sourceElement.m_isDirty;
   HTMLTextFormControlElement::copyNonAttributePropertiesFromElement(source);
 }
 
 }  // namespace blink