Fix cluster-fuzz found regression in d8 Workers.

Fix cluster-fuzz found regression in d8 Workers.

Dumb typo introduced in refs/heads/master@{#29306}. I thought I was turning on
report_exceptions in Shell::ExecuteString, but instead I turned on print_result
(which assumes an interactive debugger and a HandleScope for the
utility_context_).

BUG=chromium:504727, chromium:504728
R=mstarzinger@chromium.org
LOG=n

Committed: https://crrev.com/93c43523eac8204ae84839a0470b3ee3fe52b3e2
Cr-Commit-Position: refs/heads/master@{#29350}

[Michael Starzinger, 2015-06-29 09:38:39]

LGTM.

[binji, 2015-06-29 15:19:40]

The CQ bit was checked by binji@chromium.org

[commit-bot: I haz the power, 2015-06-29 15:19:43]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1219563002/20001

[commit-bot: I haz the power, 2015-06-29 15:48:36]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-06-29 15:48:51]

Patchset 2 (id:??) landed as
https://crrev.com/93c43523eac8204ae84839a0470b3ee3fe52b3e2
Cr-Commit-Position: refs/heads/master@{#29350}