[DO NOT COMMIT] Trace events for layout-based First Meaningful Paint detection

third_party/WebKit/Source/core/css/CSSFontSelector.h

 /*
  * Copyright (C) 2007, 2008, 2011 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 34 matching lines @@
 public:
     static CSSFontSelector* create(Document* document)
     {
         return new CSSFontSelector(document);
     }
     ~CSSFontSelector() override;
 
     unsigned version() const override { return m_fontFaceCache.version(); }
 
     PassRefPtr<FontData> getFontData(const FontDescription&, const AtomicString&) override;
-    void willUseFontData(const FontDescription&, const AtomicString& family, UChar32) override;
+    void willUseFontData(const FontDescription&, const AtomicString& family, const String& text) override;
     void willUseRange(const FontDescription&, const AtomicString& familyName, const FontDataForRangeSet&) override;
     bool isPlatformFontAvailable(const FontDescription&, const AtomicString& family);
 
     void fontFaceInvalidated();
 
     // FontCacheClient implementation
     void fontCacheInvalidated() override;
 
     void registerForInvalidationCallbacks(CSSFontSelectorClient*);
     void unregisterForInvalidationCallbacks(CSSFontSelectorClient*);
@@ skipping 18 matching lines @@
     WeakMember<Document> m_document;
     // FIXME: Move to Document or StyleEngine.
     FontFaceCache m_fontFaceCache;
     HeapHashSet<WeakMember<CSSFontSelectorClient>> m_clients;
     GenericFontFamilySettings m_genericFontFamilySettings;
 };
 
 } // namespace blink
 
 #endif // CSSFontSelector_h