Remove unused method PrefService::ReloadPersistentPrefs().

Remove unused method PrefService::ReloadPersistentPrefs().

This was removed as part of removing the import process in issue 219419.

BUG=219419
R=battre@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=225185

[gab, 2013-09-24 21:56:19]

Please take a look, feel free to CQ.

Thanks!
Gab

[battre, 2013-09-25 09:51:41]

lgtm

[commit-bot: I haz the power, 2013-09-25 09:51:44]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/gab@chromium.org/24453002/1

[commit-bot: I haz the power, 2013-09-25 10:33:50]

Retried try job too often on linux_rel for step(s) net_unittests,
remoting_unittests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_rel&...

[commit-bot: I haz the power, 2013-09-25 13:12:51]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/gab@chromium.org/24453002/1

[commit-bot: I haz the power, 2013-09-25 14:09:52]

Retried try job too often on linux_rel for step(s) unit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_rel&...

[gab, 2013-09-25 14:15:12]

Committed patchset #1 manually as r225185 (presubmit successful).