[ios] Put autofill scripts into anonymous function.

[ios] Put autofill scripts into anonymous function.

WKWebView returns NSError if script evaluation result type is not
supported. Since all scripts are wrapped into anonymous function,
autofill should be wrapped too.

BUG=None

Committed: https://crrev.com/f98c6e47937e14eab3786c13f25bd403580b0a48
Cr-Commit-Position: refs/heads/master@{#412550}

[Eugene But (OOO till 7-30), 2016-08-15 21:19:51]

eugenebut@chromium.org changed reviewers:
+ jdonnelly@chromium.org

[Justin Donnelly, 2016-08-17 14:23:24]

lgtm

[Eugene But (OOO till 7-30), 2016-08-17 15:30:29]

The CQ bit was checked by eugenebut@chromium.org

[commit-bot: I haz the power, 2016-08-17 15:30:52]

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, 2016-08-17 16:19:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-17 16:21:27]

Description was changed from

==========
[ios] Put autofill scripts into anonymous function.

WKWebView returns NSError if script evaluation result type is not
supported. Since all scripts are wrapped into anonymous function,
autofill should be wrapped too.

BUG=None
==========

to

==========
[ios] Put autofill scripts into anonymous function.

WKWebView returns NSError if script evaluation result type is not
supported. Since all scripts are wrapped into anonymous function,
autofill should be wrapped too.

BUG=None

Committed: https://crrev.com/f98c6e47937e14eab3786c13f25bd403580b0a48
Cr-Commit-Position: refs/heads/master@{#412550}
==========

[commit-bot: I haz the power, 2016-08-17 16:21:28]

Patchset 1 (id:??) landed as
https://crrev.com/f98c6e47937e14eab3786c13f25bd403580b0a48
Cr-Commit-Position: refs/heads/master@{#412550}