[heap] Fix GC tracing order in FinalizeIncrementalMarking.

[heap] Fix GC tracing order in FinalizeIncrementalMarking.

This ensures that GC tracer scope is nested in a trace event.

BUG=

Committed: https://crrev.com/177e04aacb2b6b157b1cf2a4e4bf904a7c209c3d
Cr-Commit-Position: refs/heads/master@{#35413}

[ulan, 2016-04-12 11:03:09]

ulan@chromium.org changed reviewers:
+ mlippautz@chromium.org

[ulan, 2016-04-12 11:03:09]

ptal

[Michael Lippautz, 2016-04-12 11:20:36]

lgtm

[ulan, 2016-04-12 11:36:28]

The CQ bit was checked by ulan@chromium.org

[commit-bot: I haz the power, 2016-04-12 11:36:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1881993002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1881993002/1

[commit-bot: I haz the power, 2016-04-12 11:57:24]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-04-12 11:58:59]

Description was changed from

==========
[heap] Fix GC tracing order in FinalizeIncrementalMarking.

This ensures that GC tracer scope is nested in a trace event.

BUG=
==========

to

==========
[heap] Fix GC tracing order in FinalizeIncrementalMarking.

This ensures that GC tracer scope is nested in a trace event.

BUG=

Committed: https://crrev.com/177e04aacb2b6b157b1cf2a4e4bf904a7c209c3d
Cr-Commit-Position: refs/heads/master@{#35413}
==========

[commit-bot: I haz the power, 2016-04-12 11:59:00]

Patchset 1 (id:??) landed as
https://crrev.com/177e04aacb2b6b157b1cf2a4e4bf904a7c209c3d
Cr-Commit-Position: refs/heads/master@{#35413}