Add a missing handle scope to ScriptController::shouldBypassMainWorldCSP

Add a missing handle scope to ScriptController::shouldBypassMainWorldCSP

Although I cannot reproduce the crash, as far as I see the crash report,
it seems that we are missing a handle scope in ScriptController::shouldBypassMainWorldCSP.

BUG=411773
TEST=None, I cannot reproduce

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=181647

[haraken, 2014-09-09 01:07:58]

haraken@chromium.org changed reviewers:
+ dcarney@chromium.org, jochen@chromium.org

[haraken, 2014-09-09 01:07:59]

PTAL

[Mike West, 2014-09-09 06:35:09]

mkwst@chromium.org changed reviewers:
+ mkwst@chromium.org

[Mike West, 2014-09-09 06:35:10]

LGTM.

[haraken, 2014-09-09 06:39:19]

The CQ bit was checked by haraken@chromium.org

[commit-bot: I haz the power, 2014-09-09 06:40:23]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/haraken@chromium.org/556713002/1

[jochen (gone - plz use gerrit), 2014-09-09 07:50:41]

lgtm, thanks

I still wonder why this code path is executed at all

[commit-bot: I haz the power, 2014-09-09 09:33:57]

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

[commit-bot: I haz the power, 2014-09-09 09:33:57]

Try jobs failed on following builders:
  win_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/win_blink_rel/builds/26161)

[Mike West, 2014-09-09 13:34:56]

The CQ bit was checked by mkwst@chromium.org

[commit-bot: I haz the power, 2014-09-09 13:36:09]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/haraken@chromium.org/556713002/1

[commit-bot: I haz the power, 2014-09-09 14:21:54]

Committed patchset #1 (id:1) as 181647