Introduce PacketReceiver and remove configuration of simulations via the BweTestConfig.

This makes it possible to build more flexible simulations, and makes it easier to implement bi-directional simulations. This also removes support for generating baseline files and comparing against a baseline, which hasn't turned out to be particuarly useful.

BUG=4173
R=pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/35069004

Cr-Commit-Position: refs/heads/master@{#8311}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8311 4adac7df-926f-26a2-2b94-8c16560cd09d
6 files changed