perkj f2880a0e04 Change webrtc::VideoSourceInterface to inherit rtc::VideoSourceInterface.
Also introduce a typedef VideoTrackSourceInterface to be able to start changing clients such as Chrome to use the name VideoTrackSourceInterface.

Document: https://docs.google.com/a/google.com/document/d/1mEIw_0uDzyHjL3l8a82WKp6AvgR8Tlwn9JGvhbUjVpY/edit?usp=sharing

BUG=webrtc:5426

Review URL: https://codereview.webrtc.org/1758223002

Cr-Commit-Position: refs/heads/master@{#11854}
2016-03-03 09:51:56 +00:00
..
2016-03-02 16:00:07 +00:00
2016-02-08 14:46:04 +00:00