WebRTCDemo: fix out-of-bounds array read.

Also removed the WebRtcCamera class, which has become an empty wrapper around
CameraInfo in the post-rewrite world.

First pointed out by Jeremy Mao <yujie.mao@webrtc.org> in
http://review.webrtc.org/6869004/

R=henrike@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/7079004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@5377 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed