[Font Load Events] Partial implementation of SetClass operations for FontFaceSet

Source/core/css/CSSSegmentedFontFaceCache.cpp

 /*
  * Copyright (C) 2007, 2008, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 35 matching lines @@
     : m_version(0)
 {
 }
 
 void CSSSegmentedFontFaceCache::add(CSSFontSelector* cssFontSelector, const StyleRuleFontFace* fontFaceRule, PassRefPtr<CSSFontFace> prpCssFontFace)
 {
     RefPtr<CSSFontFace> cssFontFace = prpCssFontFace;
 
     if (!m_styleRuleToFontFace.add(fontFaceRule, cssFontFace).isNewEntry)
         return;
+    m_fontFaceList.add(cssFontFace);
 
     FontFace* fontFace = cssFontFace->fontFace();
 
     OwnPtr<TraitsMap>& familyFontFaces = m_fontFaces.add(fontFace->family(), nullptr).iterator->value;
     if (!familyFontFaces)
         familyFontFaces = adoptPtr(new TraitsMap);
 
     RefPtr<CSSSegmentedFontFace>& segmentedFontFace = familyFontFaces->add(fontFace->traitsMask(), 0).iterator->value;
     if (!segmentedFontFace)
         segmentedFontFace = CSSSegmentedFontFace::create(cssFontSelector, static_cast<FontTraitsMask>(fontFace->traitsMask()));
@@ skipping 19 matching lines @@
     if (familyFontFacesIter == familyFontFaces->end())
         return;
     RefPtr<CSSSegmentedFontFace> segmentedFontFace = familyFontFacesIter->value;
 
     segmentedFontFace->removeFontFace(cssFontFace);
     if (segmentedFontFace->isEmpty()) {
         familyFontFaces->remove(familyFontFacesIter);
         if (familyFontFaces->isEmpty())
             m_fontFaces.remove(fontFacesIter);
     }
+    m_fontFaceList.remove(styleRuleToFontFaceIter->value);
     m_styleRuleToFontFace.remove(styleRuleToFontFaceIter);
     m_fonts.clear();
     ++m_version;
 }
 
 static inline bool compareFontFaces(CSSSegmentedFontFace* first, CSSSegmentedFontFace* second, FontTraitsMask desiredTraitsMask)
 {
     FontTraitsMask firstTraitsMask = first->traitsMask();
     FontTraitsMask secondTraitsMask = second->traitsMask();
 
@@ skipping 94 matching lines @@
             if ((traitsMask & FontVariantNormalMask) && !(candidateTraitsMask & FontVariantNormalMask))
                 continue;
             if (!face || compareFontFaces(candidate, face.get(), traitsMask))
                 face = candidate;
         }
     }
     return face.get();
 }
 
 }