Clean up forward declarations in Source/platform

Source/platform/fonts/FontFallbackList.h

 /*
  * Copyright (C) 2006, 2010 Apple Inc. All rights reserved.
  *
  * 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
@@ skipping 12 matching lines @@
 
 #include "platform/fonts/FontSelector.h"
 #include "platform/fonts/SimpleFontData.h"
 #include "platform/fonts/WidthCache.h"
 #include "wtf/Forward.h"
 #include "wtf/MainThread.h"
 
 namespace blink {
 
 class GlyphPageTreeNode;
-class GraphicsContext;
-class IntRect;
 class FontDescription;
-class FontPlatformData;
-class FontSelector;
 
 const int cAllFamiliesScanned = -1;
 
 class PLATFORM_EXPORT FontFallbackList : public RefCounted<FontFallbackList> {
     WTF_MAKE_NONCOPYABLE(FontFallbackList);
 public:
     typedef HashMap<int, GlyphPageTreeNode*, DefaultHash<int>::Hash> GlyphPages;
 
     class GlyphPagesStateSaver {
     public:
@@ skipping 79 matching lines @@
     unsigned m_fontSelectorVersion;
     mutable int m_familyIndex;
     unsigned short m_generation;
     mutable unsigned m_pitch : 3; // Pitch
     mutable bool m_hasLoadingFallback : 1;
 };
 
 } // namespace blink
 
 #endif