Add tracing to public PeerConnection methods.

Add tracing to public PeerConnection methods.

Adds tracing specifically to Close, for creating streams and also moves
tracing for SetLocal/RemoteDescription from WebRtcSession. Also adding
some tracing in ChannelManager to see what's taking time inside Close.

BUG=webrtc:5167
R=tommi@webrtc.org

Committed: https://chromium.googlesource.com/external/webrtc/+/1a9d615cbf93662519748aafc96d1ea23fa1a9e1

[pbos-webrtc, 2015-12-08 13:45:27]

PTAL, this moves tracing even higher and also catches some teardown tracing
(Close()).

[tommi, 2015-12-08 14:14:42]

lgtm

[commit-bot: I haz the power, 2015-12-08 21:15:30]

Description was changed from

==========
Add tracing to public PeerConnection methods.

Adds tracing specifically to Close, for creating streams and also moves
tracing for SetLocal/RemoteDescription from WebRtcSession. Also adding
some tracing in ChannelManager to see what's taking time inside Close.

BUG=webrtc:5167
R=tommi@webrtc.org
==========

to

==========
Add tracing to public PeerConnection methods.

Adds tracing specifically to Close, for creating streams and also moves
tracing for SetLocal/RemoteDescription from WebRtcSession. Also adding
some tracing in ChannelManager to see what's taking time inside Close.

BUG=webrtc:5167
R=tommi@webrtc.org

Committed: https://crrev.com/1a9d615cbf93662519748aafc96d1ea23fa1a9e1
Cr-Commit-Position: refs/heads/master@{#10943}
==========

[pbos-webrtc, 2015-12-08 21:15:30]

Description was changed from

==========
Add tracing to public PeerConnection methods.

Adds tracing specifically to Close, for creating streams and also moves
tracing for SetLocal/RemoteDescription from WebRtcSession. Also adding
some tracing in ChannelManager to see what's taking time inside Close.

BUG=webrtc:5167
R=tommi@webrtc.org
==========

to

==========
Add tracing to public PeerConnection methods.

Adds tracing specifically to Close, for creating streams and also moves
tracing for SetLocal/RemoteDescription from WebRtcSession. Also adding
some tracing in ChannelManager to see what's taking time inside Close.

BUG=webrtc:5167
R=tommi@webrtc.org

Committed:
https://chromium.googlesource.com/external/webrtc/+/1a9d615cbf93662519748aafc...
==========

[commit-bot: I haz the power, 2015-12-08 21:15:30]

Patchset 1 (id:??) landed as
https://crrev.com/1a9d615cbf93662519748aafc96d1ea23fa1a9e1
Cr-Commit-Position: refs/heads/master@{#10943}

[pbos-webrtc, 2015-12-08 21:15:31]

Committed patchset #1 (id:1) manually as
1a9d615cbf93662519748aafc96d1ea23fa1a9e1 (presubmit successful).