Prefix MOVE_ONLY_TYPE_FOR_CPP_03 with WEBRTC_.

Will fix a redefinition error in Chromium against webrtc head.

TESTED=trybots
R=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/2869004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5029 4adac7df-926f-26a2-2b94-8c16560cd09d
2 files changed