Fix crash in --print-scopes when Scope::variables_ is empty

Fix crash in --print-scopes when Scope::variables_ is empty

Apparently our HashMap can't deal with iteration over an empty map.

R=verwaest@chromium.org,neis@chromium.org
BUG=v8:5711
Committed: https://crrev.com/1f53653e6cd3e80a5e75723748bbd2c2647f8886
Cr-Commit-Position: refs/heads/master@{#41535}

[neis, 2016-12-06 10:28:17]

lgtm

[neis, 2016-12-06 10:43:23]

Description was changed from

==========
Fix crash in --print-scopes when Scope::variables_ is empty

Apparently our HashMap can't deal with iteration over an empty map.

R=verwaest@chromium.org,neis@chromium.org
BUG=v8:5711
==========

to

==========
Fix crash in --print-scopes when Scope::variables_ is empty

Apparently our HashMap can't deal with iteration over an empty map.

R=verwaest@chromium.org,neis@chromium.org
BUG=v8:5711
==========

[adamk, 2016-12-06 18:34:04]

The CQ bit was checked by adamk@chromium.org

[commit-bot: I haz the power, 2016-12-06 18:34:11]

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, 2016-12-06 19:16:12]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1481049244278380,
"parent_rev": "8950b9aa7a94ffe7797a56c6b2976b8664582b48", "commit_rev":
"2d8fa42c956f3fdf0c5ec88369ea13724c65c087"}

[commit-bot: I haz the power, 2016-12-06 19:16:18]

Description was changed from

==========
Fix crash in --print-scopes when Scope::variables_ is empty

Apparently our HashMap can't deal with iteration over an empty map.

R=verwaest@chromium.org,neis@chromium.org
BUG=v8:5711
==========

to

==========
Fix crash in --print-scopes when Scope::variables_ is empty

Apparently our HashMap can't deal with iteration over an empty map.

R=verwaest@chromium.org,neis@chromium.org
BUG=v8:5711
==========

[commit-bot: I haz the power, 2016-12-06 19:16:18]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-12-06 19:16:49]

Description was changed from

==========
Fix crash in --print-scopes when Scope::variables_ is empty

Apparently our HashMap can't deal with iteration over an empty map.

R=verwaest@chromium.org,neis@chromium.org
BUG=v8:5711
==========

to

==========
Fix crash in --print-scopes when Scope::variables_ is empty

Apparently our HashMap can't deal with iteration over an empty map.

R=verwaest@chromium.org,neis@chromium.org
BUG=v8:5711

Committed: https://crrev.com/1f53653e6cd3e80a5e75723748bbd2c2647f8886
Cr-Commit-Position: refs/heads/master@{#41535}
==========

[commit-bot: I haz the power, 2016-12-06 19:16:50]

Patchset 2 (id:??) landed as
https://crrev.com/1f53653e6cd3e80a5e75723748bbd2c2647f8886
Cr-Commit-Position: refs/heads/master@{#41535}