Add firewall methods to chromeos::PermissionBrokerClient.

Add firewall methods to chromeos::PermissionBrokerClient.

This patch adds DBus method wrappers to PermissionBrokerClient for the
new Request(Tcp|Udp)PortAccess and Release(Tcp|Udp)Port methods
supported by permission_broker.

BUG=435404
Committed: https://crrev.com/1e6ff460097c1f069ae16be987459000b9340a5e
Cr-Commit-Position: refs/heads/master@{#318186}

[Reilly Grant (use Gerrit), 2015-02-26 00:51:43]

reillyg@chromium.org changed reviewers:
+ hashimoto@chromium.org

[Reilly Grant (use Gerrit), 2015-02-26 01:19:26]

Hashimoto-san, please take a look.

[hashimoto, 2015-02-26 03:22:22]

lgtm

https://codereview.chromium.org/960033002/diff/1/chromeos/dbus/permission_bro...
File chromeos/dbus/permission_broker_client.cc (right):

https://codereview.chromium.org/960033002/diff/1/chromeos/dbus/permission_bro...
chromeos/dbus/permission_broker_client.cc:21: using
permission_broker::kReleaseUdpPort;
nit: How about sorting these lines lexicographically?

[Reilly Grant (use Gerrit), 2015-02-26 03:37:37]

The CQ bit was checked by reillyg@chromium.org

[Reilly Grant (use Gerrit), 2015-02-26 03:37:38]

The patchset sent to the CQ was uploaded after l-g-t-m from
hashimoto@chromium.org
Link to the patchset: https://codereview.chromium.org/960033002/#ps20001 (title:
"Sort using statements lexographically.")

[commit-bot: I haz the power, 2015-02-26 03:38:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/960033002/20001

[commit-bot: I haz the power, 2015-02-26 04:41:58]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-02-26 04:42:50]

Patchset 2 (id:??) landed as
https://crrev.com/1e6ff460097c1f069ae16be987459000b9340a5e
Cr-Commit-Position: refs/heads/master@{#318186}