rtc_event_log2text doesn't currently handle all possible RtcEvent-s.
1. This CL - to make sure events are not forgotten in the future, change the succession of if-statements to a switch, so that the compiler would complain if events are ever added, but are not handled here.
2. Next CL - add handling of currently-unhandled events.
BUG=webrtc:8111
NOPRESUBMIT=True
Change-Id: Ia4459b4e760eb0208823fdab69996de0e8420703
Reviewed-on: https://webrtc-review.googlesource.com/1242
Commit-Queue: Elad Alon <eladalon@webrtc.org>
Reviewed-by: Elad Alon <eladalon@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19861}