Remove visible for testing notation for getMobileFolder()

Remove visible for testing notation for getMobileFolder()

getMobileFolder() is used in Enhanced Bookmark, and no longer needs to be marked VisibleForTesting to prevent it being stripped during proguard.

BUG=NONE

Committed: https://crrev.com/d311de611b373057dd30b848528fb20f12fde618
Cr-Commit-Position: refs/heads/master@{#301401}

[Ian Wen, 2014-10-25 05:48:28]

ianwen@chromium.org changed reviewers:
+ kkimlabs@chromium.org, tedchoc@chromium.org

[Kibeom Kim (inactive), 2014-10-25 08:38:09]

lgtm

[Ted C, 2014-10-27 15:35:44]

lgtm [updated the comment to reflect what visiblefortesting actually does]

[Ian Wen, 2014-10-27 17:27:06]

The CQ bit was checked by ianwen@chromium.org

[commit-bot: I haz the power, 2014-10-27 17:27:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/669623008/1

[commit-bot: I haz the power, 2014-10-27 18:17:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-10-27 18:18:34]

Patchset 1 (id:??) landed as
https://crrev.com/d311de611b373057dd30b848528fb20f12fde618
Cr-Commit-Position: refs/heads/master@{#301401}