Ideally, this is a stopgap fix until ATTRIBUTE_UNUSED can be given a proper definition. TBR=andrew@webrtc.org Review URL: https://webrtc-codereview.appspot.com/35409004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@7830 4adac7df-926f-26a2-2b94-8c16560cd09d