blink: Cleanup class forward declarations

third_party/WebKit/Source/platform/fonts/CustomFontData.h

 /*
  * Copyright (C) 2013 Google, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef CustomFontData_h
 #define CustomFontData_h
 
 #include "platform/PlatformExport.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
-class SimpleFontData;
-
 class PLATFORM_EXPORT CustomFontData : public RefCounted<CustomFontData> {
  public:
   static PassRefPtr<CustomFontData> create() {
     return adoptRef(new CustomFontData());
   }
 
   virtual ~CustomFontData() {}
 
   virtual void beginLoadIfNeeded() const {}
   virtual bool isLoading() const { return false; }
   virtual bool isLoadingFallback() const { return false; }
   virtual bool shouldSkipDrawing() const { return false; }
   virtual void clearFontFaceSource() {}
 
  protected:
   CustomFontData() {}
 };
 
 }  // namespace blink
 
 #endif  // CustomFontData_h