[iOS] Upstream changes to swipe recognizer

[iOS] Upstream changes to swipe recognizer

Update swipe recognizer to differentiate between edge/non-edge
swipes.

BUG=None

Committed: https://crrev.com/46439ad2021110ab9cbed34a8d7e04fe41008ae9
Cr-Commit-Position: refs/heads/master@{#330355}

[sdefresne, 2015-05-18 13:50:09]

sdefresne@chromium.org changed reviewers:
+ noyau@chromium.org

[sdefresne, 2015-05-18 13:50:11]

Please take a look.

justincohen: FYI

[sdefresne, 2015-05-18 13:54:59]

Note that this is upstreaming a downstream CL.

[noyau (Ping after 24h), 2015-05-18 13:56:10]

lgtm, but please change the description to match the content of the CL as
discussed offline.

[sdefresne, 2015-05-18 13:58:35]

The CQ bit was checked by sdefresne@chromium.org

[commit-bot: I haz the power, 2015-05-18 13:58:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1137623007/1

[sdefresne, 2015-05-18 13:58:58]

Done. Thank you for the review.

[commit-bot: I haz the power, 2015-05-18 14:05:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-18 14:06:33]

Patchset 1 (id:??) landed as
https://crrev.com/46439ad2021110ab9cbed34a8d7e04fe41008ae9
Cr-Commit-Position: refs/heads/master@{#330355}