Minor cleanups to includes and fwd decls in core/css/resolver

Source/core/css/resolver/ViewportStyleResolver.h

 /*
  * Copyright (C) 2012 Intel Corporation. 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.
@@ skipping 18 matching lines @@
 
 #ifndef ViewportStyleResolver_h
 #define ViewportStyleResolver_h
 
 #include "CSSPropertyNames.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
-class CSSPrimitiveValue;
 class Document;
 class MutableStylePropertySet;
 class StyleRuleViewport;
 
 class ViewportStyleResolver : public RefCounted<ViewportStyleResolver> {
 public:
     static PassRefPtr<ViewportStyleResolver> create(Document* document)
     {
         return adoptRef(new ViewportStyleResolver(document));
     }
@@ skipping 10 matching lines @@
 
     float getViewportArgumentValue(CSSPropertyID) const;
 
     Document* m_document;
     RefPtr<MutableStylePropertySet> m_propertySet;
 };
 
 } // namespace WebCore
 
 #endif // ViewportStyleResolver_h