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akling@apple.com authored
<https://webkit.org/b/123072> Let functions that return newly-constructed StyleRuleFoo objects vend PassRef<StyleRuleFoo> instead of PassRefPtr. Since StyleRuleBase::copy() has to return something, we can't rely on ASSERT_NOT_REACHED() + return nullptr anymore, so I've replaced those with CRASH(). No call sites actually handled null anyway. Reviewed by Sam Weinig. git-svn-id: http://svn.webkit.org/repository/webkit/trunk@157698 268f45cc-cd09-0410-ab3c-d52691b4dbfc
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