Fix Refcount in FontDataCache for objects from FontFallbackIterator

third_party/WebKit/Source/platform/fonts/FontDataForRangeSet.h

 /*
  * Copyright (C) 2008, 2009 Apple 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 18 matching lines @@
 #include "platform/fonts/FontData.h"
 #include "platform/fonts/SimpleFontData.h"
 #include "platform/fonts/UnicodeRangeSet.h"
 #include "wtf/Allocator.h"
 #include "wtf/text/CharacterNames.h"
 
 namespace blink {
 
 class SimpleFontData;
 
-class FontDataForRangeSet final {
-    DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
-
+class PLATFORM_EXPORT FontDataForRangeSet : public RefCounted<FontDataForRangeSet> {
+public:
     explicit FontDataForRangeSet(PassRefPtr<SimpleFontData> fontData = nullptr, PassRefPtr<UnicodeRangeSet> rangeSet = nullptr)
         : m_fontData(fontData)
         , m_rangeSet(rangeSet)
     {
     }
 
     // Shorthand for GlyphPageTreeNode tests.
     explicit FontDataForRangeSet(PassRefPtr<SimpleFontData> fontData, UChar32 from, UChar32 to)
         : m_fontData(fontData)
     {
         UnicodeRange range(from, to);
         Vector<UnicodeRange> rangeVector;
         rangeVector.append(range);
         m_rangeSet = adoptRef(new UnicodeRangeSet(rangeVector));
     }
 
+    FontDataForRangeSet(const FontDataForRangeSet& other);
+
+    virtual ~FontDataForRangeSet() { };
 
     bool contains(UChar32 testChar) const { return m_rangeSet->contains(testChar); }
     bool isEntireRange() const { return m_rangeSet->isEntireRange(); }
     UnicodeRangeSet* ranges() const { return m_rangeSet.get(); }
     bool hasFontData() const { return m_fontData.get(); }
     const SimpleFontData* fontData() const { return m_fontData.get(); }
 
-private:
+protected:
     RefPtr<SimpleFontData> m_fontData;
     RefPtr<UnicodeRangeSet> m_rangeSet;
 };
 
+class PLATFORM_EXPORT FontDataForRangeSetFromCache : public FontDataForRangeSet {
+public:
+    explicit FontDataForRangeSetFromCache(PassRefPtr<SimpleFontData> fontData,
+        PassRefPtr<UnicodeRangeSet> rangeSet = nullptr)
+        : FontDataForRangeSet(fontData, rangeSet)
+    {
+    }
+    virtual ~FontDataForRangeSetFromCache();
+};
+
 } // namespace blink
 
 #endif