Make the device::HidService destructor protected.

Make the device::HidService destructor protected.

This prevents anything other than device::HidService::Destroyer from
calling the destructor. For example, scoped_ptr, as was the case in
HidConnectionTest.

BUG=

Committed: https://crrev.com/ce69e2adaf3ec91056ec87e1a59848b9781709c1
Cr-Commit-Position: refs/heads/master@{#293623}

[Reilly Grant (use Gerrit), 2014-09-05 19:49:55]

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

[Ken Rockot(use gerrit already), 2014-09-05 19:52:04]

lgtm

https://codereview.chromium.org/542153004/diff/1/device/hid/hid_service.h
File device/hid/hid_service.h (right):

https://codereview.chromium.org/542153004/diff/1/device/hid/hid_service.h#new...
device/hid/hid_service.h:42: virtual ~HidService();
Any reason not to make it private?

[Reilly Grant (use Gerrit), 2014-09-05 20:19:05]

https://codereview.chromium.org/542153004/diff/1/device/hid/hid_service.h
File device/hid/hid_service.h (right):

https://codereview.chromium.org/542153004/diff/1/device/hid/hid_service.h#new...
device/hid/hid_service.h:42: virtual ~HidService();
On 2014/09/05 19:52:04, Ken Rockot wrote:
> Any reason not to make it private?

Sub-classes.

[Reilly Grant (use Gerrit), 2014-09-05 20:20:13]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2014-09-05 20:47:09]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/reillyg@chromium.org/542153004/1

[commit-bot: I haz the power, 2014-09-06 07:52:37]

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

[commit-bot: I haz the power, 2014-09-06 07:52:38]

Exceeded time limit waiting for builds to trigger.

[Reilly Grant (use Gerrit), 2014-09-06 17:04:13]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2014-09-06 17:05:23]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/reillyg@chromium.org/542153004/1

[commit-bot: I haz the power, 2014-09-06 18:40:50]

Committed patchset #1 (id:1) as 3cff8f4f41ac652cabd5a571230da0c3307494be

[commit-bot: I haz the power, 2014-09-10 03:42:54]

Patchset 1 (id:??) landed as
https://crrev.com/ce69e2adaf3ec91056ec87e1a59848b9781709c1
Cr-Commit-Position: refs/heads/master@{#293623}