webrtc/base: removes accidental #error in r6909.

BUG=N/A
R=turaj@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/13269004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6924 4adac7df-926f-26a2-2b94-8c16560cd09d