[compiler] Move tracing from backends to compiler.

[compiler] Move tracing from backends to compiler.

R=bmeurer@chromium.org

Committed: https://crrev.com/318cc682f49e98c3acb3b9a6c41282c4e495a654
Cr-Commit-Position: refs/heads/master@{#35384}

[Michael Starzinger, 2016-04-08 17:05:19]

Patchset #2 (id:20001) has been deleted

[Benedikt Meurer, 2016-04-09 16:54:27]

LGTM.

[Michael Starzinger, 2016-04-11 12:04:40]

The CQ bit was checked by mstarzinger@chromium.org

[Michael Starzinger, 2016-04-11 12:04:40]

The patchset sent to the CQ was uploaded after l-g-t-m from bmeurer@chromium.org
Link to the patchset: https://codereview.chromium.org/1872833002/#ps60001
(title: "Rebased.")

[commit-bot: I haz the power, 2016-04-11 12:04:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1872833002/60001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1872833002/60001

[commit-bot: I haz the power, 2016-04-11 12:06:45]

Committed patchset #3 (id:60001)

[commit-bot: I haz the power, 2016-04-11 12:07:55]

Description was changed from

==========
[compiler] Move tracing from backends to compiler.

R=bmeurer@chromium.org
==========

to

==========
[compiler] Move tracing from backends to compiler.

R=bmeurer@chromium.org

Committed: https://crrev.com/318cc682f49e98c3acb3b9a6c41282c4e495a654
Cr-Commit-Position: refs/heads/master@{#35384}
==========

[commit-bot: I haz the power, 2016-04-11 12:07:56]

Patchset 3 (id:??) landed as
https://crrev.com/318cc682f49e98c3acb3b9a6c41282c4e495a654
Cr-Commit-Position: refs/heads/master@{#35384}