Clean up forward declarations in Source/core/page

Source/core/page/PageSerializer.h

 /*
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 32 matching lines @@
 class ImageResource;
 class CSSStyleSheet;
 class CSSValue;
 class Document;
 class LocalFrame;
 class Page;
 class RenderObject;
 class Resource;
 class SharedBuffer;
 class StylePropertySet;
-class StyleRule;
-class StyleRuleFontFace;
 
 struct SerializedResource;
 
 // This class is used to serialize a page contents back to text (typically HTML).
 // It serializes all the page frames and retrieves resources such as images and CSS stylesheets.
 class PageSerializer {
 public:
     explicit PageSerializer(Vector<SerializedResource>*);
 
     // Initiates the serialization of the frame's page. All serialized content and retrieved
@@ skipping 21 matching lines @@
 
     Vector<SerializedResource>* m_resources;
     ListHashSet<KURL> m_resourceURLs;
     HashMap<LocalFrame*, KURL> m_blankFrameURLs;
     unsigned m_blankFrameCounter;
 };
 
 }
 
 #endif