Revert "Remove remains of WEBRTC_NO_STL." (rev 6641).
Reason breaks linux_memcheck.

TBR=stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/16869004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6645 4adac7df-926f-26a2-2b94-8c16560cd09d