Fixes linker issue with no op trace.

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

Review URL: https://webrtc-codereview.appspot.com/1669004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@4226 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed