Do not zero-initialize RawPtr.

Source/core/svg/SVGFontFaceSrcElement.cpp

 /*
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 31 matching lines @@
 
 PassRefPtr<SVGFontFaceSrcElement> SVGFontFaceSrcElement::create(Document& document)
 {
     return adoptRef(new SVGFontFaceSrcElement(document));
 }
 
 PassRefPtrWillBeRawPtr<CSSValueList> SVGFontFaceSrcElement::srcValue() const
 {
     RefPtrWillBeRawPtr<CSSValueList> list = CSSValueList::createCommaSeparated();
     for (SVGElement* element = Traversal<SVGElement>::firstChild(*this); element; element = Traversal<SVGElement>::nextSibling(*element)) {
-        RefPtrWillBeRawPtr<CSSFontFaceSrcValue> srcValue;
+        RefPtrWillBeRawPtr<CSSFontFaceSrcValue> srcValue = nullptr;
         if (isSVGFontFaceUriElement(*element))
             srcValue = toSVGFontFaceUriElement(*element).srcValue();
         else if (isSVGFontFaceNameElement(*element))
             srcValue = toSVGFontFaceNameElement(*element).srcValue();
 
         if (srcValue && srcValue->resource().length())
             list->append(srcValue);
     }
     return list;
 }
 
 void SVGFontFaceSrcElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
 {
     SVGElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
     if (isSVGFontFaceElement(parentNode()))
         toSVGFontFaceElement(*parentNode()).rebuildFontFace();
 }
 
 }
 
 #endif // ENABLE(SVG_FONTS)