Use C++11 features in core/html

Source/core/html/HTMLTableElement.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, 2008, 2010, 2011 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 385 matching lines @@
     style->setProperty(CSSPropertyBorderTopStyle, value);
     style->setProperty(CSSPropertyBorderBottomStyle, value);
     style->setProperty(CSSPropertyBorderLeftStyle, value);
     style->setProperty(CSSPropertyBorderRightStyle, value);
     return style.release();
 }
 
 const StylePropertySet* HTMLTableElement::additionalPresentationAttributeStyle()
 {
     if (m_frameAttr)
-        return 0;
+        return nullptr;
 
     if (!m_borderAttr && !m_borderColorAttr) {
         // Setting the border to 'hidden' allows it to win over any border
         // set on the table's cells during border-conflict resolution.
         if (m_rulesAttr != UnsetRules) {
             DEFINE_STATIC_REF_WILL_BE_PERSISTENT(StylePropertySet, solidBorderStyle, (createBorderStyle(CSSValueHidden)));
             return solidBorderStyle;
         }
-        return 0;
+        return nullptr;
     }
 
     if (m_borderColorAttr) {
         DEFINE_STATIC_REF_WILL_BE_PERSISTENT(StylePropertySet, solidBorderStyle, (createBorderStyle(CSSValueSolid)));
         return solidBorderStyle;
     }
     DEFINE_STATIC_REF_WILL_BE_PERSISTENT(StylePropertySet, outsetBorderStyle, (createBorderStyle(CSSValueOutset)));
     return outsetBorderStyle;
 }
 
@@ skipping 80 matching lines @@
         style->setProperty(CSSPropertyBorderRightWidth, CSSValueThin);
         style->setProperty(CSSPropertyBorderLeftStyle, CSSValueSolid);
         style->setProperty(CSSPropertyBorderRightStyle, CSSValueSolid);
     }
     return style.release();
 }
 
 const StylePropertySet* HTMLTableElement::additionalGroupStyle(bool rows)
 {
     if (m_rulesAttr != GroupsRules)
-        return 0;
+        return nullptr;
 
     if (rows) {
         DEFINE_STATIC_REF_WILL_BE_PERSISTENT(StylePropertySet, rowBorderStyle, (createGroupBorderStyle(true)));
         return rowBorderStyle;
     }
     DEFINE_STATIC_REF_WILL_BE_PERSISTENT(StylePropertySet, columnBorderStyle, (createGroupBorderStyle(false)));
     return columnBorderStyle;
 }
 
 bool HTMLTableElement::isURLAttribute(const Attribute& attribute) const
@@ skipping 31 matching lines @@
     return getAttribute(summaryAttr);
 }
 
 void HTMLTableElement::trace(Visitor* visitor)
 {
     visitor->trace(m_sharedCellStyle);
     HTMLElement::trace(visitor);
 }
 
 }