Removed unused Document forward declaration+include from SecurityOrigin

Source/core/page/SecurityOrigin.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
@@ skipping 16 matching lines @@
  */
 
 #ifndef SecurityOrigin_h
 #define SecurityOrigin_h
 
 #include <wtf/ThreadSafeRefCounted.h>
 #include <wtf/text/WTFString.h>
 
 namespace WebCore {
 
-class Document;
 class KURL;
 
 class SecurityOrigin : public ThreadSafeRefCounted<SecurityOrigin> {
 public:
     enum Policy {
         AlwaysDeny = 0,
         AlwaysAllow,
         Ask
     };
 
@@ skipping 172 matching lines @@
     bool m_universalAccess;
     bool m_domainWasSetInDOM;
     bool m_canLoadLocalResources;
     bool m_enforceFilePathSeparation;
     bool m_needsDatabaseIdentifierQuirkForFiles;
 };
 
 } // namespace WebCore
 
 #endif // SecurityOrigin_h