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

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

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2006, 2007, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Holger Hans Peter Freyther
  *
  * 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
@@ skipping 127 matching lines @@
 
     bool computeCanShapeWordByWord() const;
 
     friend struct SimpleShaper;
 
 public:
     FontSelector* getFontSelector() const;
     PassRefPtr<FontFallbackIterator> createFontFallbackIterator(
         FontFallbackPriority) const;
 
-    void willUseFontData(UChar32) const;
+    void willUseFontData(const String& text) const;
 
     bool loadingCustomFonts() const;
     bool isFallbackValid() const;
 
 private:
     bool shouldSkipDrawing() const
     {
         return m_fontFallbackList && m_fontFallbackList->shouldSkipDrawing();
     }
 
@@ skipping 38 matching lines @@
     // if the distance to the next tab stop is less than that, advance an additional tab stop.
     if (distanceToTabStop < std::max(getFontDescription().letterSpacing(), LayoutUnit::epsilon()))
         distanceToTabStop += baseTabWidth;
 
     return distanceToTabStop;
 }
 
 } // namespace blink
 
 #endif