Not all stats are collected in this CL, this must be addressed before closing the issue. [1] https://w3c.github.io/webrtc-stats/#inboundrtpstats-dict* Re-landed after having to be reverted https://codereview.webrtc.org/2470683002/ due to depending on a CL that was reverted. Now that that has re-landed https://codereview.webrtc.org/2470703002/ this is ready to re-land. BUG=chromium:627816, chromium:657855, chromium:657854 R=hta@webrtc.org TBR=deadbeef@webrtc.org Review-Url: https://codereview.webrtc.org/2465173003 Cr-Commit-Position: refs/heads/master@{#14868}