Add message loop to v8's unittests

Add message loop to v8's unittests

When (at least some) v8 unittests are started in bigger batch
we hit v8 garbage collector's incremental marking hard limit.
When it happens v8's engine posts task and it causes crash as
there is no active message loop. This change creates message
loop for v8's unittests to fix this crash.

BUG=695374
Review-Url: https://codereview.chromium.org/2735703003
Cr-Commit-Position: refs/heads/master@{#454898}
Committed: https://chromium.googlesource.com/chromium/src/+/798c699f3c8ca93487d257d7eda0a59b35ee1d9e

[ckulakowski, 2017-03-06 12:47:39]

Description was changed from

==========
Add message loop to v8's unittests

When (at least some) v8 unittests are started in bigger batch
we hit v8 garbage collector's incremental marking hard limit.
When it happens v8's engine posts task and it causes crash as
there is no active message loop. This change creates message
loop for v8's unittests to fix this crash.

BUG=695374
==========

to

==========
Add message loop to v8's unittests

When (at least some) v8 unittests are started in bigger batch
we hit v8 garbage collector's incremental marking hard limit.
When it happens v8's engine posts task and it causes crash as
there is no active message loop. This change creates message
loop for v8's unittests to fix this crash.

BUG=695374
==========

[ckulakowski, 2017-03-06 12:47:39]

ckulakowski@opera.com changed reviewers:
+ phajdan.jr@chromium.org

[Paweł Hajdan Jr., 2017-03-06 17:37:43]

phajdan.jr@chromium.org changed reviewers:
+ jam@chromium.org

[Paweł Hajdan Jr., 2017-03-06 17:37:43]

LGTM + jam@ FYI

[ckulakowski, 2017-03-06 18:10:26]

The CQ bit was checked by ckulakowski@opera.com

[commit-bot: I haz the power, 2017-03-06 18:10:50]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-03-06 18:40:16]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1488823826684580, "parent_rev":
"fbb72741a769f768299bdeb7865dac5785ce1fd9", "commit_rev":
"798c699f3c8ca93487d257d7eda0a59b35ee1d9e"}

[commit-bot: I haz the power, 2017-03-06 18:40:59]

Description was changed from

==========
Add message loop to v8's unittests

When (at least some) v8 unittests are started in bigger batch
we hit v8 garbage collector's incremental marking hard limit.
When it happens v8's engine posts task and it causes crash as
there is no active message loop. This change creates message
loop for v8's unittests to fix this crash.

BUG=695374
==========

to

==========
Add message loop to v8's unittests

When (at least some) v8 unittests are started in bigger batch
we hit v8 garbage collector's incremental marking hard limit.
When it happens v8's engine posts task and it causes crash as
there is no active message loop. This change creates message
loop for v8's unittests to fix this crash.

BUG=695374

Review-Url: https://codereview.chromium.org/2735703003
Cr-Commit-Position: refs/heads/master@{#454898}
Committed:
https://chromium.googlesource.com/chromium/src/+/798c699f3c8ca93487d257d7eda0...
==========

[commit-bot: I haz the power, 2017-03-06 18:41:00]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/798c699f3c8ca93487d257d7eda0...