Initiate webfont download right after style recalc

Source/core/css/CSSFontFace.h

 /*
  * Copyright (C) 2007, 2008 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 66 matching lines @@
 
     private:
         UChar32 m_from;
         UChar32 m_to;
     };
 
     class UnicodeRangeSet {
     public:
         void add(UChar32 from, UChar32 to) { m_ranges.append(UnicodeRange(from, to)); }
         bool intersectsWith(const String&) const;
+        bool isEntireRange() const { return m_ranges.isEmpty(); }
         size_t size() const { return m_ranges.size(); }
         const UnicodeRange& rangeAt(size_t i) const { return m_ranges[i]; }
     private:
-        Vector<UnicodeRange> m_ranges;
+        Vector<UnicodeRange> m_ranges; // If empty, represents the whole code space.
     };
 
     FontFace::LoadStatus loadStatus() const { return m_fontFace ? m_fontFace->loadStatus() : FontFace::Loaded; }
     void willUseFontData(const FontDescription&);
 
 private:
     CSSFontFace(PassRefPtr<FontFace> fontFace)
         : m_segmentedFontFace(0)
         , m_activeSource(0)
         , m_fontFace(fontFace)
     {
     }
     void setLoadStatus(FontFace::LoadStatus);
 
     UnicodeRangeSet m_ranges;
     CSSSegmentedFontFace* m_segmentedFontFace;
     Vector<OwnPtr<CSSFontFaceSource> > m_sources;
     CSSFontFaceSource* m_activeSource;
     RefPtr<FontFace> m_fontFace;
 };
 
 }
 
 #endif