Pass implementation object to supplemental classes by reference

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 143 matching lines @@
     m_fontFace->setLoadStatus(newStatus);
 
     if (!m_segmentedFontFace)
         return;
     Document* document = m_segmentedFontFace->fontSelector()->document();
     if (!document)
         return;
 
     switch (newStatus) {
     case FontFace::Loading:
-        FontFaceSet::from(document)->beginFontLoading(m_fontFace);
+        FontFaceSet::from(*document)->beginFontLoading(m_fontFace);
         break;
     case FontFace::Loaded:
-        FontFaceSet::from(document)->fontLoaded(m_fontFace);
+        FontFaceSet::from(*document)->fontLoaded(m_fontFace);
         break;
     case FontFace::Error:
-        FontFaceSet::from(document)->loadError(m_fontFace);
+        FontFaceSet::from(*document)->loadError(m_fontFace);
         break;
     default:
         break;
     }
 }
 
 bool CSSFontFace::UnicodeRangeSet::intersectsWith(const String& text) const
 {
     if (text.isEmpty())
         return false;
     if (isEntireRange())
         return true;
 
     // FIXME: This takes O(text.length() * m_ranges.size()) time. It would be
     // better to make m_ranges sorted and use binary search.
     unsigned index = 0;
     while (index < text.length()) {
         UChar32 c = text.characterStartingAt(index);
         index += U16_LENGTH(c);
         for (unsigned i = 0; i < m_ranges.size(); i++) {
             if (m_ranges[i].contains(c))
                 return true;
         }
     }
     return false;
 }
 
 }