commit 4dd7ba4cffb3b98f8e7edfe8f13e10796841a557
author akling@apple.com <akling@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> Wed Oct 23 10:48:47 2013 +0000
committer akling@apple.com <akling@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> Wed Oct 23 10:48:47 2013 +0000
tree 8955c9842d4d0de52f15d8ee3e72f350ad7b20b9
parent 5bbaebd3b747306b15ede17f3e54191a79d1e50a

StringImpl::lower() should return a PassRef.
<https://webkit.org/b/123190>

Test the waters and hack enough of StringImpl to be able to return
a PassRef<StringImpl> from lower().

Also gave String a constructor that takes a PassRef<StringImpl>.

Reviewed by Antti Koivisto.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@157855 268f45cc-cd09-0410-ab3c-d52691b4dbfc