Oilpan: Trace SVGFontFaceElement::m_fontElement.

Source/core/svg/SVGFontFaceElement.cpp

 /*
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2008 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 31 matching lines @@
 #include "platform/fonts/Font.h"
 #include <math.h>
 
 namespace WebCore {
 
 using namespace SVGNames;
 
 inline SVGFontFaceElement::SVGFontFaceElement(Document& document)
     : SVGElement(font_faceTag, document)
     , m_fontFaceRule(StyleRuleFontFace::create())
-    , m_fontElement(0)
+    , m_fontElement(nullptr)
     , m_weakFactory(this)
 {
     ScriptWrappable::init(this);
     RefPtrWillBeRawPtr<MutableStylePropertySet> styleDeclaration = MutableStylePropertySet::create(HTMLStandardMode);
     m_fontFaceRule->setProperties(styleDeclaration.release());
 }
 
 DEFINE_NODE_FACTORY(SVGFontFaceElement)
 
 static CSSPropertyID cssPropertyIdForFontFaceAttributeName(const QualifiedName& attrName)
@@ skipping 212 matching lines @@
 
     bool describesParentFont = isSVGFontElement(*parentNode());
     RefPtrWillBeRawPtr<CSSValueList> list = nullptr;
 
     if (describesParentFont) {
         m_fontElement = toSVGFontElement(parentNode());
 
         list = CSSValueList::createCommaSeparated();
         list->append(CSSFontFaceSrcValue::createLocal(fontFamily()));
     } else {
-        m_fontElement = 0;
+        m_fontElement = nullptr;
         // we currently ignore all but the last src element, alternatively we could concat them
         if (SVGFontFaceSrcElement* element = Traversal<SVGFontFaceSrcElement>::lastChild(*this))
             list = element->srcValue();
     }
 
     if (!list || !list->length())
         return;
 
     // Parse in-memory CSS rules
     m_fontFaceRule->mutableProperties().addParsedProperty(CSSProperty(CSSPropertySrc, list));
@@ skipping 24 matching lines @@
 
     rebuildFontFace();
     return InsertionDone;
 }
 
 void SVGFontFaceElement::removedFrom(ContainerNode* rootParent)
 {
     SVGElement::removedFrom(rootParent);
 
     if (rootParent->inDocument()) {
-        m_fontElement = 0;
+        m_fontElement = nullptr;
         document().accessSVGExtensions().unregisterSVGFontFaceElement(this);
 
         // FIXME: HTMLTemplateElement's document or imported  document can be active?
         // If so, we also need to check whether fontSelector() is nullptr or not.
         // Otherwise, we will use just document().isActive() here.
         if (document().isActive() && document().styleEngine()->fontSelector()) {
             document().styleEngine()->fontSelector()->fontFaceCache()->remove(m_fontFaceRule.get());
             document().accessSVGExtensions().registerPendingSVGFontFaceElementsForRemoval(this);
         }
         m_fontFaceRule->mutableProperties().clear();
         document().styleResolverChanged();
     } else
         ASSERT(!m_fontElement);
 }
 
 void SVGFontFaceElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
 {
     SVGElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
     rebuildFontFace();
 }
 
 void SVGFontFaceElement::trace(Visitor* visitor)
 {
     visitor->trace(m_fontFaceRule);
+    visitor->trace(m_fontElement);
     SVGElement::trace(visitor);
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(SVG_FONTS)