Remove the ENABLE_NOSNIFF compile-time flag.

Source/WebCore/loader/cache/CachedScript.cpp

 /*
     Copyright (C) 1998 Lars Knoll (knoll@mpi-hd.mpg.de)
     Copyright (C) 2001 Dirk Mueller (mueller@kde.org)
     Copyright (C) 2002 Waldo Bastian (bastian@kde.org)
     Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
     Copyright (C) 2004, 2005, 2006, 2007, 2008 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
@@ skipping 83 matching lines @@
 }
 
 void CachedScript::destroyDecodedData()
 {
     m_script = String();
     setDecodedSize(0);
     if (!MemoryCache::shouldMakeResourcePurgeableOnEviction() && isSafeToMakePurgeable())
         makePurgeable(true);
 }
 
-#if ENABLE(NOSNIFF)
 bool CachedScript::mimeTypeAllowedByNosniff() const
 {
     return !parseContentTypeOptionsHeader(m_response.httpHeaderField("X-Content-Type-Options")) == ContentTypeOptionsNosniff || MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType());
 }
-#endif
 
 void CachedScript::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
 {
     MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::CachedResourceScript);
     CachedResource::reportMemoryUsage(memoryObjectInfo);
     info.addMember(m_script, "script");
     info.addMember(m_decoder, "decoder");
 }
 
 } // namespace WebCore