Use SingleParameterFormatter for settings override permissions.

Use SingleParameterFormatter for settings override permissions.

The search provider, home page and start pages override permission
messages each take a parameter describing the URL that the setting
can be changed to. This was being properly handed in
settings_override_permission.cc but not in the message formatters in
chrome_permission_message_rules.cc.

This change also removes the duplicate rules for these permissions.

BUG=496332
Committed: https://crrev.com/c1f0c854d5c1ce20351d69a97f6538ed9acbd24c
Cr-Commit-Position: refs/heads/master@{#333119}

[Reilly Grant (use Gerrit), 2015-06-03 21:10:22]

reillyg@chromium.org changed reviewers:
+ rdevlin.cronin@chromium.org

[Reilly Grant (use Gerrit), 2015-06-03 21:10:51]

Please take a look.

[Reilly Grant (use Gerrit), 2015-06-05 16:24:38]

Ping?

[Devlin, 2015-06-05 17:34:54]

Sorry for the delay; lgtm.

[Reilly Grant (use Gerrit), 2015-06-05 18:02:27]

On 2015/06/05 17:34:54, Devlin wrote:
> Sorry for the delay; lgtm.

Thank you for the review.

[Reilly Grant (use Gerrit), 2015-06-05 18:02:32]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2015-06-05 18:03:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1165553008/1

[commit-bot: I haz the power, 2015-06-05 20:40:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-06-05 20:41:08]

Patchset 1 (id:??) landed as
https://crrev.com/c1f0c854d5c1ce20351d69a97f6538ed9acbd24c
Cr-Commit-Position: refs/heads/master@{#333119}