Fix components/rlz/BUILD.gn on iOS.

Fix components/rlz/BUILD.gn on iOS.

The intention of the code was to add //ui/base to the list of deps
when building for iOS, not to replace the list, so use the correct
operator.

BUG=459705
Committed: https://crrev.com/d336c9f3c43921fda32cddeeb42ed116fd9f5d55
Cr-Commit-Position: refs/heads/master@{#340062}

[sdefresne, 2015-07-22 16:49:20]

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

[sdefresne, 2015-07-22 16:49:21]

PTAL

[Roger Tawa OOO till Jul 10th, 2015-07-22 18:11:08]

lgtm

[sdefresne, 2015-07-23 09:11:27]

The CQ bit was checked by sdefresne@chromium.org

[commit-bot: I haz the power, 2015-07-23 09:11:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1253463002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1253463002/1

[commit-bot: I haz the power, 2015-07-23 09:45:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-23 09:46:04]

Patchset 1 (id:??) landed as
https://crrev.com/d336c9f3c43921fda32cddeeb42ed116fd9f5d55
Cr-Commit-Position: refs/heads/master@{#340062}