Fix memory bot failure

Exit the method with critical setting held. This should make
the memory bot happy.

TBR=pwestin@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1704005

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@4251 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed