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akling@apple.com authored
<https://webkit.org/b/123641> Make the helpers involved in constructing CSS{Initial,Inherited}Value all return PassRef instead of PassRefPtr. This avoids generating pointless null checks at the call sites. Reviewed by Darin Adler. git-svn-id: http://svn.webkit.org/repository/webkit/trunk@158465 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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