0 -> nullptr for UseCounter pointer in CSSParserContext.

third_party/WebKit/Source/core/svg/SVGLength.cpp

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 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
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 115 matching lines @@
     return result;
 }
 
 SVGParsingError SVGLength::setValueAsString(const String& string)
 {
     if (string.isEmpty()) {
         m_value = CSSPrimitiveValue::create(0, CSSPrimitiveValue::UnitType::UserUnits);
         return SVGParseStatus::NoError;
     }
 
-    CSSParserContext svgParserContext(SVGAttributeMode, 0);
+    CSSParserContext svgParserContext(SVGAttributeMode, nullptr);
     CSSValue* parsed = CSSParser::parseSingleValue(CSSPropertyX, string, svgParserContext);
     if (!parsed || !parsed->isPrimitiveValue())
         return SVGParseStatus::ExpectedLength;
 
     CSSPrimitiveValue* newValue = toCSSPrimitiveValue(parsed);
     // TODO(fs): Enable calc for SVG lengths
     if (newValue->isCalculated() || !isSupportedCSSUnitType(newValue->typeWithCalcResolved()))
         return SVGParseStatus::ExpectedLength;
 
     m_value = newValue;
@@ skipping 109 matching lines @@
 
 float SVGLength::calculateDistance(SVGPropertyBase* toValue, SVGElement* contextElement)
 {
     SVGLengthContext lengthContext(contextElement);
     SVGLength* toLength = toSVGLength(toValue);
 
     return fabsf(toLength->value(lengthContext) - value(lengthContext));
 }
 
 } // namespace blink