Some classes which inherited from Noncopyable overrides operator new, since Noncopyable'll be inherited from FastAllocBase we need to add this special class to Noncopyable.h (based on Darin's https://bugs.webkit.org/show_bug.cgi?id=27029#c0 comment).
Created attachment 32670 [details] proposed patch
Landed in https://trac.webkit.org/changeset/45883.