Move Font related classes to Source/platform/fonts

Source/core/platform/graphics/FontCache.h

 /*
  * Copyright (C) 2006, 2008 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2007-2008 Torch Mobile, Inc.
  *
  * 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.
@@ skipping 99 matching lines @@
     static AtomicString getGenericFamilyNameForScript(const AtomicString& familyName, UScriptCode);
 #else
     struct SimpleFontFamily {
         String name;
         bool isBold;
         bool isItalic;
     };
     static void getFontFamilyForCharacter(UChar32, const char* preferredLocale, SimpleFontFamily*);
 #endif
 
-    // Multiplying the floating point size by 100 gives two decimal
-    // point precision which should be sufficient.
-    static const unsigned s_fontSizePrecisionMultiplier = 100;
-
 private:
     FontCache();
     ~FontCache();
 
     void disablePurging() { m_purgePreventCount++; }
     void enablePurging()
     {
         ASSERT(m_purgePreventCount);
         if (!--m_purgePreventCount)
             purgeInactiveFontDataIfNeeded();
@@ skipping 32 matching lines @@
 
 class FontCachePurgePreventer {
 public:
     FontCachePurgePreventer() { fontCache()->disablePurging(); }
     ~FontCachePurgePreventer() { fontCache()->enablePurging(); }
 };
 
 }
 
 #endif