Use removeFontFace to avoid resetting fontSelector.

Source/core/css/StyleSheetContents.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010, 2012 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 23 matching lines @@
 
 
 namespace WebCore {
 
 class CSSStyleSheet;
 class CSSStyleSheetResource;
 class Document;
 class Node;
 class SecurityOrigin;
 class StyleRuleBase;
+class StyleRuleFontFace;
 class StyleRuleImport;
 
 class StyleSheetContents : public RefCountedWillBeRefCountedGarbageCollected<StyleSheetContents> {
     DECLARE_GC_INFO
 public:
     static PassRefPtrWillBeRawPtr<StyleSheetContents> create(const CSSParserContext& context)
     {
         return adoptRefCountedWillBeRefCountedGarbageCollected(new StyleSheetContents(0, String(), context));
     }
     static PassRefPtrWillBeRawPtr<StyleSheetContents> create(const String& originalURL, const CSSParserContext& context)
@@ skipping 33 matching lines @@
     bool loadCompleted() const;
     bool hasFailedOrCanceledSubresources() const;
 
     KURL completeURL(const String& url) const;
 
     void setHasSyntacticallyValidCSSHeader(bool isValidCss);
     bool hasSyntacticallyValidCSSHeader() const { return m_hasSyntacticallyValidCSSHeader; }
 
     void setHasFontFaceRule(bool b) { m_hasFontFaceRule = b; }
     bool hasFontFaceRule() const { return m_hasFontFaceRule; }
+    void findFontFaceRules(Vector<const StyleRuleFontFace*>& fontFaceRules);
 
     void parserAddNamespace(const AtomicString& prefix, const AtomicString& uri);
     void parserAppendRule(PassRefPtr<StyleRuleBase>);
     void parserSetEncodingFromCharsetRule(const String& encoding);
     void parserSetUsesRemUnits(bool b) { m_usesRemUnits = b; }
 
     void clearRules();
 
     bool hasCharsetRule() const { return !m_encodingFromCharsetRule.isNull(); }
     String encodingFromCharsetRule() const { return m_encodingFromCharsetRule; }
@@ skipping 42 matching lines @@
     void shrinkToFit();
     RuleSet& ruleSet() { ASSERT(m_ruleSet); return *m_ruleSet.get(); }
     RuleSet& ensureRuleSet(const MediaQueryEvaluator&, AddRuleFlags);
     void clearRuleSet();
 
     void trace(Visitor*);
 
 private:
     StyleSheetContents(StyleRuleImport* ownerRule, const String& originalURL, const CSSParserContext&);
     StyleSheetContents(const StyleSheetContents&);
+    void notifyRemoveFontFaceRule(const StyleRuleFontFace*);
 
     void clearCharsetRule();
 
     StyleRuleImport* m_ownerRule;
 
     String m_originalURL;
 
     String m_encodingFromCharsetRule;
     Vector<RefPtr<StyleRuleImport> > m_importRules;
     Vector<RefPtr<StyleRuleBase> > m_childRules;
@@ skipping 10 matching lines @@
 
     CSSParserContext m_parserContext;
 
     Vector<CSSStyleSheet*> m_clients;
     OwnPtr<RuleSet> m_ruleSet;
 };
 
 } // namespace
 
 #endif