Update URL for Google Toolbox for Mac.

Update URL for Google Toolbox for Mac.

The old URL is just a redirect to the new URL, so use the new URL.

BUG=chromium:476190
Committed: https://crrev.com/e5355200dbb3c0a1c283e3ee84c6ef7156b90919
Cr-Commit-Position: refs/heads/master@{#353360}

[bungeman-chromium, 2015-10-09 18:37:38]

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

[bungeman-chromium, 2015-10-09 18:37:59]

bungeman@chromium.org changed reviewers:
+ mark@chromium.org

[commit-bot: I haz the power, 2015-10-09 18:39:08]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1397503003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1397503003/1

[commit-bot: I haz the power, 2015-10-09 18:57:30]

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

[commit-bot: I haz the power, 2015-10-09 18:57:31]

Dry run: This issue passed the CQ dry run.

[Mark Mentovai, 2015-10-09 18:58:22]

LGTM

[bungeman-chromium, 2015-10-09 19:02:08]

The CQ bit was checked by bungeman@chromium.org

[commit-bot: I haz the power, 2015-10-09 19:07:49]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1397503003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1397503003/1

[commit-bot: I haz the power, 2015-10-09 19:27:50]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-09 19:29:47]

Patchset 1 (id:??) landed as
https://crrev.com/e5355200dbb3c0a1c283e3ee84c6ef7156b90919
Cr-Commit-Position: refs/heads/master@{#353360}