talk/ios: Fixes source after corrupt sync in r6305 (which corrupted r6291).

BUG=N/A
R=tkchin@webrtc.org
TBR=tkchin@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/21589004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@6318 4adac7df-926f-26a2-2b94-8c16560cd09d