pbos@webrtc.org 4b3618c7f3 Remove TraceImpl logging thread.
Simplifies TraceImpl significantly. Chromium uses trace callbacks and
logs directly through the trace callback interface. Added slowdowns when
logging to file are expected to only affect test targets.

BUG=
R=andresp@webrtc.org, tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/34329004

Cr-Commit-Position: refs/heads/master@{#8529}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8529 4adac7df-926f-26a2-2b94-8c16560cd09d
2015-02-27 15:05:50 +00:00
..
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