Templatize and clean up codec wildcards.

BUG=4123
R=pthatcher@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/39209004

Cr-Commit-Position: refs/heads/master@{#8422}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8422 4adac7df-926f-26a2-2b94-8c16560cd09d
2 files changed