Unreviewed, rolling out r208584.

Seems to have regressed Speedometer by 1% on Mac

Reverted changeset:

"We should have a more concise way of determining when we're
varargs calling a function using rest parameters"
https://bugs.webkit.org/show_bug.cgi?id=164258
http://trac.webkit.org/changeset/208584

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@208592 268f45cc-cd09-0410-ab3c-d52691b4dbfc
65 files changed