Make text visible when font loading takes longer than 3 seconds

Source/core/css/CSSFontFaceSource.cpp

 /*
  * Copyright (C) 2007, 2008, 2010, 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 108 matching lines @@
 void CSSFontFaceSource::fontLoaded(FontResource*)
 {
     if (!m_fontDataTable.isEmpty())
         m_histograms.recordRemoteFont(m_font.get());
 
     pruneTable();
     if (m_face)
         m_face->fontLoaded(this);
 }
 
+void CSSFontFaceSource::fontLoadWaitLimitExceeded(FontResource*)
+{
+    pruneTable();
+    if (m_face)
+        m_face->fontLoadWaitLimitExceeded(this);
+}
+
 PassRefPtr<SimpleFontData> CSSFontFaceSource::getFontData(const FontDescription& fontDescription)
 {
     // If the font hasn't loaded or an error occurred, then we've got nothing.
     if (!isValid())
         return nullptr;
 
     if (isLocal()) {
         // We're local. Just return a SimpleFontData from the normal cache.
         // We don't want to check alternate font family names here, so pass true as the checkingAlternateName parameter.
         RefPtr<SimpleFontData> fontData = FontCache::fontCache()->getFontData(fontDescription, m_string, true);
@@ skipping 77 matching lines @@
 #endif
         }
     } else {
         // This temporary font is not retained and should not be returned.
         FontCachePurgePreventer fontCachePurgePreventer;
         SimpleFontData* temporaryFont = FontCache::fontCache()->getNonRetainedLastResortFallbackFont(fontDescription);
         if (!temporaryFont) {
             ASSERT_NOT_REACHED();
             return nullptr;
         }
-        RefPtr<CSSCustomFontData> cssFontData = CSSCustomFontData::create(true);
+        RefPtr<CSSCustomFontData> cssFontData = CSSCustomFontData::create(true, m_font->exceedsFontLoadWaitLimit() ? CustomFontData::VisibleFallback : CustomFontData::InvisibleFallback);
         cssFontData->setCSSFontFaceSource(this);
         fontData = SimpleFontData::create(temporaryFont->platformData(), cssFontData);
     }
 
     return fontData; // No release, because fontData is a reference to a RefPtr that is held in the m_fontDataTable.
 }
 
 #if ENABLE(SVG_FONTS)
 SVGFontFaceElement* CSSFontFaceSource::svgFontFaceElement() const
 {
@@ skipping 75 matching lines @@
     if (size < 50 * 1024)
         return "WebFont.DownloadTime.1.10KBTo50KB";
     if (size < 100 * 1024)
         return "WebFont.DownloadTime.2.50KBTo100KB";
     if (size < 1024 * 1024)
         return "WebFont.DownloadTime.3.100KBTo1MB";
     return "WebFont.DownloadTime.4.Over1MB";
 }
 
 }