[Autofill] Fixes a bug with the CardUnmaskPromptViewController.

[Autofill] Fixes a bug with the CardUnmaskPromptViewController.

Checks whether _CVCItem exists in the model before querying its IndexPath.

BUG=602666
Review-Url: https://codereview.chromium.org/2955243002
Cr-Commit-Position: refs/heads/master@{#482915}
Committed: https://chromium.googlesource.com/chromium/src/+/151692a9bc022761b878dff04e514dc364f3ac62

[Moe, 2017-06-28 00:15:01]

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

[commit-bot: I haz the power, 2017-06-28 00:15:53]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Moe, 2017-06-28 00:16:20]

mahmadi@chromium.org changed reviewers:
+ lpromero@chromium.org

[Moe, 2017-06-28 00:16:20]

Hi Louis, Please take a look.

[commit-bot: I haz the power, 2017-06-28 00:34:31]

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

[commit-bot: I haz the power, 2017-06-28 00:34:32]

Dry run: This issue passed the CQ dry run.

[lpromero, 2017-06-28 07:49:17]

The CQ bit was checked by lpromero@chromium.org

[lpromero, 2017-06-28 07:49:18]

lgtm

[commit-bot: I haz the power, 2017-06-28 07:49:26]

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, 2017-06-28 07:52:20]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1498636157816410, "parent_rev":
"55911cd8d79455ec434081c1d986b4bad10d0454", "commit_rev":
"151692a9bc022761b878dff04e514dc364f3ac62"}

[commit-bot: I haz the power, 2017-06-28 07:52:36]

Description was changed from

==========
[Autofill] Fixes a bug with the CardUnmaskPromptViewController.

Checks whether _CVCItem exists in the model before querying its IndexPath.

BUG=602666
==========

to

==========
[Autofill] Fixes a bug with the CardUnmaskPromptViewController.

Checks whether _CVCItem exists in the model before querying its IndexPath.

BUG=602666

Review-Url: https://codereview.chromium.org/2955243002
Cr-Commit-Position: refs/heads/master@{#482915}
Committed:
https://chromium.googlesource.com/chromium/src/+/151692a9bc022761b878dff04e51...
==========

[commit-bot: I haz the power, 2017-06-28 07:52:37]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/151692a9bc022761b878dff04e51...