Zhi Huang 0a5fdbb455 Use RTC_HISTOGRAM_ENUMERATION to report SRTP/SRTCP unprotect error.
Besides using the MetricsObserverInterface, using RTC_HISTOGRAM_ENUMERATION
directly using RTC_HISTOGRAM_ENUMERATION to report the error which is
needed by internal projects.

Bug: b/110121202, webrtc:9409
Change-Id: I1aaece91200905ea0495229dc2b5e62b1d61279b
Reviewed-on: https://webrtc-review.googlesource.com/83565
Commit-Queue: Zhi Huang <zhihuang@webrtc.org>
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23616}
2018-06-14 18:35:11 +00:00
..
2018-05-25 00:16:03 +00:00