Log errors from libusb.

Log errors from libusb.

Convert numeric error code from libusb into human readable strings and
log them. Some of these errors should, in addition, be passed up to the
running script.

BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=278769

[Ken Rockot(use gerrit already), 2014-06-19 23:09:37]

https://codereview.chromium.org/344793009/diff/1/components/usb_service/usb_e...
File components/usb_service/usb_error.cc (right):

https://codereview.chromium.org/344793009/diff/1/components/usb_service/usb_e...
components/usb_service/usb_error.cc:12: return
libusb_strerror((libusb_error)errcode);
nit: Please use static_cast<libusb_error>(errorcode). No C-style casts.

[Ken Rockot(use gerrit already), 2014-06-19 23:25:20]

On 2014/06/19 23:24:47, reillyg wrote:

not lgtm

[Ken Rockot(use gerrit already), 2014-06-19 23:27:12]

lgtm

[Reilly Grant (use Gerrit), 2014-06-19 23:28:38]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2014-06-19 23:30:48]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/reillyg@chromium.org/344793009/40001

[Reilly Grant (use Gerrit), 2014-06-20 00:49:06]

Bei Zhang, please review the libusb.gyp change.

[Ken Rockot(use gerrit already), 2014-06-20 03:07:16]

-ikarienator +meacer

Bei is no longer on the project. Mustafa could you please take a look for the
libusb gyp change?

[commit-bot: I haz the power, 2014-06-20 08:10:53]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  chromium_presubmit on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/chromium_presubmit/bu...)
  ios_dbg_simulator on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/ios_dbg_simulator/bui...)
  win_chromium_x64_rel on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/win_chromium_x64_rel/...)

[commit-bot: I haz the power, 2014-06-20 08:17:41]

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

[commit-bot: I haz the power, 2014-06-20 08:17:42]

Try jobs failed on following builders:
  chromium_presubmit on tryserver.chromium
(http://build.chromium.org/p/tryserver.chromium/builders/chromium_presubmit/bu...)

[meacer, 2014-06-20 17:27:43]

libusb.gyp lgtm.

[Reilly Grant (use Gerrit), 2014-06-20 17:30:20]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2014-06-20 17:30:58]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/reillyg@chromium.org/344793009/40001

[commit-bot: I haz the power, 2014-06-20 18:14:02]

Change committed as 278769