[debug] fix case of GC-unsafe access in Debug::HandleDebugBreak.

[debug] fix case of GC-unsafe access in Debug::HandleDebugBreak.

BUG=v8:6311
R=jkummerow@chromium.org

Review-Url: https://codereview.chromium.org/2845853003
Cr-Commit-Position: refs/heads/master@{#44930}
Committed: https://chromium.googlesource.com/v8/v8/+/2920ea59a42fabb0a3121c85395bfa537dfa20d5

[Jakob Kummerow, 2017-04-27 12:03:09]

LGTM, thanks!

[Yang, 2017-04-27 12:03:27]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2017-04-27 12:03:38]

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, 2017-04-27 12:26:55]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1493294607653230, "parent_rev":
"34ae5a09b38bde043cf97e3dd0bff9baf2f72839", "commit_rev":
"2920ea59a42fabb0a3121c85395bfa537dfa20d5"}

[commit-bot: I haz the power, 2017-04-27 12:27:00]

Description was changed from

==========
[debug] fix case of GC-unsafe access in Debug::HandleDebugBreak.

BUG=v8:6311
R=jkummerow@chromium.org
==========

to

==========
[debug] fix case of GC-unsafe access in Debug::HandleDebugBreak.

BUG=v8:6311
R=jkummerow@chromium.org

Review-Url: https://codereview.chromium.org/2845853003
Cr-Commit-Position: refs/heads/master@{#44930}
Committed:
https://chromium.googlesource.com/v8/v8/+/2920ea59a42fabb0a3121c85395bfa537df...
==========

[commit-bot: I haz the power, 2017-04-27 12:27:01]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/2920ea59a42fabb0a3121c85395bfa537df...