Revert 292399 "deps2git: Improve support for WebRTC and its deps."

Revert 292399 "deps2git: Improve support for WebRTC and its deps."

Breaks WebRTC's Chromium bots in http://build.chromium.org/p/chromium.webrtc/waterfall
among other waterfalls. This happens due to dependencies in http://chromegw.corp.google.com/viewvc/chrome/trunk/deps/third_party/webrtc/webrtc.DEPS/
ending up with invalid Git mirrors.

> deps2git: Improve support for WebRTC and its deps.
> 
> * Remove old unused WebRTC URLs (stable branch was removed
>   about a year ago).
> * Make the WebRTC matching more generic, so it can match both
>   trunk and deps. This will add support for:
>   - deps/third_party/junit 
>   - deps/third_party/openmax  
>   - deps/third_party/winsdk_samples_v71
>   and thus the special case for openmax can be removed.
> 
> BUG=419516
> TESTED=Passing build with:
> scripts/tools/run_recipe.py webrtc/standalone buildername="Linux64 Debug" mastername=client.webrtc slavename=x revision='"7414"' use_mirror=True
> when combined with https://codereview.chromium.org/472963003/
> 
> Review URL: https://codereview.chromium.org/627493002

TBR=kjellander@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=292420

[kjellander_chromium, 2014-10-13 06:22:06]

Committed patchset #1 (id:1) manually as r292420 (tree was closed).