tree 055da71b07896819403f4e0515c8b54db322d776
parent 2a495ca2971282bda060d603e95a498dd9839689
author hbos <hbos@webrtc.org> 1482312545 -0800
committer Commit bot <commit-bot@chromium.org> 1482312545 +0000

RTCStatsReport::AddStats DCHECKs that the ID is unique.

Previously it was allowed to call AddStats with stats of the same ID
multiple times.

This revealed a few things:
- Local and remote streams can have the same label.
  RTCMediaStreamStats's ID is updated to include "local"/"remote".
- The same certificate can show up multiple times (e.g. for local and
  remote in a loopback), so we skip creating RTCCertificateStats for the
  same certificate multiple times

BUG=chromium:627816

Review-Url: https://codereview.webrtc.org/2593503003
Cr-Commit-Position: refs/heads/master@{#15730}