[ios] Use range.length instead of range.location for substring matching.

[ios] Use range.length instead of range.location for substring matching.

NSObject.description is not nullable and may return nil. In which case
gesture recognizer should not be matched.

BUG=None

Committed: https://crrev.com/1cf5fe3f424969cf87edeebd351d697a8ed08aaf
Cr-Commit-Position: refs/heads/master@{#412593}

[Eugene But (OOO till 7-30), 2016-08-17 17:46:31]

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

[commit-bot: I haz the power, 2016-08-17 17:46:50]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Eugene But (OOO till 7-30), 2016-08-17 18:23:37]

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

[commit-bot: I haz the power, 2016-08-17 18:23:49]

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

[commit-bot: I haz the power, 2016-08-17 18:23:49]

Dry run: This issue passed the CQ dry run.

[Jackie Quinn, 2016-08-17 18:26:06]

The CQ bit was checked by jyquinn@chromium.org

[Jackie Quinn, 2016-08-17 18:26:06]

lgtm

[commit-bot: I haz the power, 2016-08-17 18:26:33]

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 18:31:09]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-17 18:38:38]

Description was changed from

==========
[ios] Use range.length instead of range.location for substring matching.

NSObject.description is not nullable and may return nil. In which case
gesture recognizer should not be matched.

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

to

==========
[ios] Use range.length instead of range.location for substring matching.

NSObject.description is not nullable and may return nil. In which case
gesture recognizer should not be matched.

BUG=None

Committed: https://crrev.com/1cf5fe3f424969cf87edeebd351d697a8ed08aaf
Cr-Commit-Position: refs/heads/master@{#412593}
==========

[commit-bot: I haz the power, 2016-08-17 18:38:39]

Patchset 1 (id:??) landed as
https://crrev.com/1cf5fe3f424969cf87edeebd351d697a8ed08aaf
Cr-Commit-Position: refs/heads/master@{#412593}