Permit single-stream max bitrates above 2000k.

BUG=4463
TBR=stefan@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/49509004

Cr-Commit-Position: refs/heads/master@{#8839}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8839 4adac7df-926f-26a2-2b94-8c16560cd09d
2 files changed