Remove extra call to UsbDeviceHandle::Close in chrome.usb.closeDevice.

Remove extra call to UsbDeviceHandle::Close in chrome.usb.closeDevice.

When chrome.usb.closeDevice is called the device is explicitly closed in
the extension function implementation and then closed again when the
UsbDeviceResource object is destroyed. Only the latter is necessary as
that covers other ways in which the resource can be released.

Committed: https://crrev.com/db9f276136d0eb947bcc31d1de6d0535400fb741
Cr-Commit-Position: refs/heads/master@{#313605}

[Reilly Grant (use Gerrit), 2015-01-28 21:43:34]

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

[Reilly Grant (use Gerrit), 2015-01-28 21:43:35]

Marijn, can you take a look at this patch?

[Marijn Kruisselbrink, 2015-01-28 21:56:13]

LGTM

Maybe remove the BUG= line in the description, or change it to something like
BUG=None, so it at least is clear you didn't just forget to fill out a bug
number in the template?

[Reilly Grant (use Gerrit), 2015-01-28 21:58:30]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2015-01-28 21:58:54]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/881363004/1

[commit-bot: I haz the power, 2015-01-28 23:10:45]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-28 23:12:01]

Patchset 1 (id:??) landed as
https://crrev.com/db9f276136d0eb947bcc31d1de6d0535400fb741
Cr-Commit-Position: refs/heads/master@{#313605}