6c95bdc5ab
Adding a simple network simulator and a mock network control observer. This prepares for upcoming CLs adding unit tests network controllers. Bug: webrtc:8415 Change-Id: I5e8414576776fb8ae897bec73a1b062c8dd3e393 Reviewed-on: https://webrtc-review.googlesource.com/61507 Commit-Queue: Sebastian Jansson <srte@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22622}