Fix several stack-traces tests using assertUnreachable()

Fix several stack-traces tests using assertUnreachable()

These tests all called assertUnreachable within a try/catch block.

BUG=v8:5246
Committed: https://crrev.com/76193d4b6c08966e83e3a10d9370c374c542b97e
Cr-Commit-Position: refs/heads/master@{#38323}

[jgruber, 2016-08-03 15:40:17]

The CQ bit was checked by jgruber@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-08-03 15:40:21]

Dry run: 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, 2016-08-03 16:02:49]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-08-03 16:02:50]

Dry run: This issue passed the CQ dry run.

[jgruber, 2016-08-03 16:20:27]

jgruber@chromium.org changed reviewers:
+ yangguo@chromium.org

[jgruber, 2016-08-03 16:20:28]

https://codereview.chromium.org/2209663003/diff/1/test/mjsunit/stack-traces.js
File test/mjsunit/stack-traces.js (left):

https://codereview.chromium.org/2209663003/diff/1/test/mjsunit/stack-traces.j...
test/mjsunit/stack-traces.js:313: error.name = { toString: function() {
assertUnreachable(); }};
This test was completely removed since the spec actually requires calling
toString on name and message.

[Yang, 2016-08-04 06:57:22]

lgtm

[jgruber, 2016-08-04 07:14:22]

The CQ bit was checked by jgruber@chromium.org

[commit-bot: I haz the power, 2016-08-04 07:14:32]

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, 2016-08-04 07:19:18]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-04 07:22:21]

Description was changed from

==========
Fix several stack-traces tests using assertUnreachable()

These tests all called assertUnreachable within a try/catch block.

BUG=v8:5246
==========

to

==========
Fix several stack-traces tests using assertUnreachable()

These tests all called assertUnreachable within a try/catch block.

BUG=v8:5246

Committed: https://crrev.com/76193d4b6c08966e83e3a10d9370c374c542b97e
Cr-Commit-Position: refs/heads/master@{#38323}
==========

[commit-bot: I haz the power, 2016-08-04 07:22:22]

Patchset 1 (id:??) landed as
https://crrev.com/76193d4b6c08966e83e3a10d9370c374c542b97e
Cr-Commit-Position: refs/heads/master@{#38323}