Make text visible when font loading takes longer than 3 seconds

Source/core/css/CSSFontFace.cpp

 /*
  * 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 69 matching lines @@
             m_sources.removeFirst();
             if (!isValid())
                 setLoadStatus(FontFace::Error);
         }
     }
 
     if (m_segmentedFontFace)
         m_segmentedFontFace->fontLoaded(this);
 }
 
+void CSSFontFace::fontLoadWaitLimitExceeded(CSSFontFaceSource* source)
+{
+    if (!isValid() || source != m_sources.first())
+        return;
+    if (m_segmentedFontFace)
+        m_segmentedFontFace->fontLoadWaitLimitExceeded(this);
+}
+
 PassRefPtr<SimpleFontData> CSSFontFace::getFontData(const FontDescription& fontDescription)
 {
     if (!isValid())
         return nullptr;
 
     while (!m_sources.isEmpty()) {
         OwnPtr<CSSFontFaceSource>& source = m_sources.first();
         if (RefPtr<SimpleFontData> result = source->getFontData(fontDescription)) {
             if (loadStatus() == FontFace::Unloaded && (source->isLoading() || source->isLoaded()))
                 setLoadStatus(FontFace::Loading);
@@ skipping 116 matching lines @@
         UChar32 c = text.characterStartingAt(index);
         index += U16_LENGTH(c);
         Vector<UnicodeRange>::const_iterator it = std::lower_bound(m_ranges.begin(), m_ranges.end(), c);
         if (it != m_ranges.end() && it->contains(c))
             return true;
     }
     return false;
 }
 
 }