6f28cf0b95
Logs tracing events (TRACE_EVENT0 and friends) to storage in a format compatible with chrome://tracing which can be used for performance evaluation, finding lock contention and other sweet things). Tracing is still basic and doesn't contain thread metadata or logging of tracing arguments. BUG=webrtc:5158 R=tommi@webrtc.org Review URL: https://codereview.webrtc.org/1457383002 . Cr-Commit-Position: refs/heads/master@{#10921}