According to http://trac.webkit.org/wiki/EfficientStrings WTF::StringBuilder::appendLiteral() shall be used for literals rather than WTF::StringBuilder::append().
Created attachment 164547 [details] patch
Comment on attachment 164547 [details] patch LGTM.
Comment on attachment 164547 [details] patch Clearing flags on attachment: 164547 Committed r128895: <http://trac.webkit.org/changeset/128895>
All reviewed patches have been landed. Closing bug.