Inherits CSSNamespace class from FastAllocBase because it has been instantiated by 'new' in WebCore/css/CSSStyleSheet.cpp:141.
Created attachment 42011 [details] proposed patch
Created attachment 42013 [details] proposed patch
Created attachment 42189 [details] updated to Noncopyable
Landed in 50363. https://trac.webkit.org/changeset/50363