WebRTC: Make got_revision be a WebRTC revision for bots in chromium.webrtc.fyi

This is needed in order to be able to use the set_component_rev feature in
https://cs.chromium.org/chromium/build/scripts/slave/recipe_modules/chromium_tests/api.py?rcl=0&l=169
which is needed for having the testers to sync the same WebRTC revision
as the builders.

This is a follow-up for https://chromium-review.googlesource.com/c/414110

BUG=chromium:669818
TBR=tandrii@chromium.org

Change-Id: I6ca77e739513009e503a3b2a6fedacde8730e9a4
Reviewed-on: https://chromium-review.googlesource.com/415788Reviewed-by: Henrik Kjellander <kjellander-cc@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Andrii Shyshkalov <tandrii@chromium.org>
Commit-Queue: Henrik Kjellander <kjellander-cc@chromium.org>

recipe_modules/gclient/config.py

@@ -403,6 +403,12 @@ def chromium_webrtc_tot(c):
   c.revisions['src'] = 'HEAD'
   c.revisions['src/third_party/webrtc'] = 'HEAD'
 
+  # Have the WebRTC revision appear in the web UI instead of Chromium's.
+  # This is also important for set_component_rev to work, since got_revision
+  # will become a WebRTC revision instead of Chromium.
+  c.got_revision_mapping['src'] = 'got_cr_revision'
+  c.got_revision_mapping['src/third_party/webrtc'] = 'got_revision'
+
   # Needed to get the testers to properly sync the right revision.
   c.parent_got_revision_mapping['parent_got_revision'] = 'got_revision'
   c.parent_got_revision_mapping['parent_got_webrtc_revision'] = (