Clean up forward declarations in WebKit/Source

Source/platform/fonts/opentype/OpenTypeVerticalData.h

 /*
  * Copyright (C) 2012 Koji Ishii <kojiishi@gmail.com>
  *
  * 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 17 matching lines @@
 #include "platform/PlatformExport.h"
 #include "platform/fonts/Glyph.h"
 #include "wtf/HashMap.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
 class FontPlatformData;
-class GlyphPage;
 class SimpleFontData;
 
 class PLATFORM_EXPORT OpenTypeVerticalData : public RefCounted<OpenTypeVerticalData> {
 public:
     static PassRefPtr<OpenTypeVerticalData> create(const FontPlatformData& platformData)
     {
         return adoptRef(new OpenTypeVerticalData(platformData));
     }
 
     bool isOpenType() const { return !m_advanceWidths.isEmpty(); }
@@ skipping 18 matching lines @@
     Vector<int16_t> m_topSideBearings;
     int16_t m_defaultVertOriginY;
     HashMap<Glyph, int16_t> m_vertOriginY;
 
     bool m_inFontCache; // for mark & sweep in FontCache::purgeInactiveFontData()
 };
 
 } // namespace blink
 
 #endif // OpenTypeVerticalData_h