Clean up forward declarations in Source/core/css

Source/core/css/CSSFontFace.h

 /*
  * Copyright (C) 2007, 2008 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 18 matching lines @@
 #include "core/css/CSSFontFaceSource.h"
 #include "core/css/CSSSegmentedFontFace.h"
 #include "core/css/FontFace.h"
 #include "wtf/Deque.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/Vector.h"
 
 namespace blink {
 
-class CSSFontSelector;
-class Document;
 class FontDescription;
 class RemoteFontFaceSource;
 class SimpleFontData;
-class StyleRuleFontFace;
 
 class CSSFontFace FINAL : public NoBaseWillBeGarbageCollectedFinalized<CSSFontFace> {
 public:
     struct UnicodeRange;
     class UnicodeRangeSet;
 
     CSSFontFace(FontFace* fontFace, Vector<UnicodeRange>& ranges)
         : m_ranges(ranges)
         , m_segmentedFontFace(nullptr)
         , m_fontFace(fontFace)
@@ skipping 62 matching lines @@
 
     UnicodeRangeSet m_ranges;
     RawPtrWillBeMember<CSSSegmentedFontFace> m_segmentedFontFace;
     WillBeHeapDeque<OwnPtrWillBeMember<CSSFontFaceSource> > m_sources;
     RawPtrWillBeMember<FontFace> m_fontFace;
 };
 
 }
 
 #endif