Fix a warning from Clang's -Wlogical-not-parentheses: logical not used to be applied to the left ha…

Source/core/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 68 matching lines @@
         // That's because the MemoryCache thinks that it can clear out decoded data by calling destroyDecodedData(),
         // but we can't destroy m_script in destroyDecodedData because that's our only copy of the data!
         setEncodedSize(m_script.sizeInBytes());
     }
 
     return m_script;
 }
 
 bool CachedScript::mimeTypeAllowedByNosniff() const
 {
-    return !parseContentTypeOptionsHeader(m_response.httpHeaderField("X-Content-Type-Options")) == ContentTypeOptionsNosniff || MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType());
+    return parseContentTypeOptionsHeader(m_response.httpHeaderField("X-Content-Type-Options")) != ContentTypeOptionsNosniff || MIMETypeRegistry::isSupportedJavaScriptMIMEType(mimeType());
 }
 
 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