[turbofan] Fix --trace-turbo handle dereferences.

[turbofan] Fix --trace-turbo handle dereferences.

Whenever tracing is activated we disable concurrent compilation. Hence
all tracing functions can safely dereference all handles. This fixes the
tracing functionality by annotating tracing functions with proper scopes.

R=bmeurer@chromium.org

Committed: https://crrev.com/0a60924e260572bcccbd88633b33e2d9ca349019
Cr-Commit-Position: refs/heads/master@{#36241}

[Benedikt Meurer, 2016-05-13 13:09:53]

lgtm

[Michael Starzinger, 2016-05-13 13:26:13]

The CQ bit was checked by mstarzinger@chromium.org

[commit-bot: I haz the power, 2016-05-13 13:26:20]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1976123002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1976123002/1

[commit-bot: I haz the power, 2016-05-13 13:29:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-13 13:31:14]

Description was changed from

==========
[turbofan] Fix --trace-turbo handle dereferences.

Whenever tracing is activated we disable concurrent compilation. Hence
all tracing functions can safely dereference all handles. This fixes the
tracing functionality by annotating tracing functions with proper scopes.

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

to

==========
[turbofan] Fix --trace-turbo handle dereferences.

Whenever tracing is activated we disable concurrent compilation. Hence
all tracing functions can safely dereference all handles. This fixes the
tracing functionality by annotating tracing functions with proper scopes.

R=bmeurer@chromium.org

Committed: https://crrev.com/0a60924e260572bcccbd88633b33e2d9ca349019
Cr-Commit-Position: refs/heads/master@{#36241}
==========

[commit-bot: I haz the power, 2016-05-13 13:31:15]

Patchset 1 (id:??) landed as
https://crrev.com/0a60924e260572bcccbd88633b33e2d9ca349019
Cr-Commit-Position: refs/heads/master@{#36241}