Use Chromium's USB descriptor parser on macOS and Windows.

Use Chromium's USB descriptor parser on macOS and Windows.

This change adds two new functions to libusb's public interface that
allow Chromium to get access to the unparsed USB descriptors. These can
then be passed to the new descriptor parser that is used on Android,
Chrome OS and Linux.

BUG=650606
Committed: https://crrev.com/50b206c50187f592efed9ed44fc8aba64c47e1d9
Cr-Commit-Position: refs/heads/master@{#430142}

[Reilly Grant (use Gerrit), 2016-11-04 20:08:00]

The CQ bit was checked by reillyg@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-11-04 20:09:02]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Reilly Grant (use Gerrit), 2016-11-04 20:09:33]

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

[Reilly Grant (use Gerrit), 2016-11-04 20:09:33]

Please take a look.

[commit-bot: I haz the power, 2016-11-04 23:40:35]

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

[commit-bot: I haz the power, 2016-11-04 23:40:36]

Dry run: This issue passed the CQ dry run.

[juncai, 2016-11-05 01:04:07]

LGTM with nit.

https://codereview.chromium.org/2471623008/diff/1/third_party/libusb/src/libu...
File third_party/libusb/src/libusb/descriptor.c (right):

https://codereview.chromium.org/2471623008/diff/1/third_party/libusb/src/libu...
third_party/libusb/src/libusb/descriptor.c:578: unsigned char *buf = NULL;
nit: |buf| seems unused.

[Reilly Grant (use Gerrit), 2016-11-05 02:31:25]

Remove unused variable.

[Reilly Grant (use Gerrit), 2016-11-05 02:31:46]

The CQ bit was checked by reillyg@chromium.org

[Reilly Grant (use Gerrit), 2016-11-05 02:31:46]

https://codereview.chromium.org/2471623008/diff/1/third_party/libusb/src/libu...
File third_party/libusb/src/libusb/descriptor.c (right):

https://codereview.chromium.org/2471623008/diff/1/third_party/libusb/src/libu...
third_party/libusb/src/libusb/descriptor.c:578: unsigned char *buf = NULL;
On 2016/11/05 at 01:04:07, juncai wrote:
> nit: |buf| seems unused.

Removed.

[Reilly Grant (use Gerrit), 2016-11-05 02:31:47]

The patchset sent to the CQ was uploaded after l-g-t-m from juncai@chromium.org
Link to the patchset: https://codereview.chromium.org/2471623008/#ps20001
(title: "Remove unused variable.")

[commit-bot: I haz the power, 2016-11-05 02:32:16]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-11-05 03:28:37]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-11-05 03:30:40]

Description was changed from

==========
Use Chromium's USB descriptor parser on macOS and Windows.

This change adds two new functions to libusb's public interface that
allow Chromium to get access to the unparsed USB descriptors. These can
then be passed to the new descriptor parser that is used on Android,
Chrome OS and Linux.

BUG=650606
==========

to

==========
Use Chromium's USB descriptor parser on macOS and Windows.

This change adds two new functions to libusb's public interface that
allow Chromium to get access to the unparsed USB descriptors. These can
then be passed to the new descriptor parser that is used on Android,
Chrome OS and Linux.

BUG=650606

Committed: https://crrev.com/50b206c50187f592efed9ed44fc8aba64c47e1d9
Cr-Commit-Position: refs/heads/master@{#430142}
==========

[commit-bot: I haz the power, 2016-11-05 03:30:40]

Patchset 2 (id:??) landed as
https://crrev.com/50b206c50187f592efed9ed44fc8aba64c47e1d9
Cr-Commit-Position: refs/heads/master@{#430142}