Resolve two USB transfer handling regressions.

Resolve two USB transfer handling regressions.

Two regressions were introduced by https://crrev.com/30c6291b559f48df49.
The first was that the wValue and wIndex fields of control transfers
were passed as uint8s, truncating these normally 16-bit values. The
second was that the number of packets of an isochronous transfer was
no longer passed to libusb_alloc_transfer.

BUG=443107
Committed: https://crrev.com/75c69eaf605093e4654ff16ac77b93630165ab61
Cr-Commit-Position: refs/heads/master@{#309598}

[Reilly Grant (use Gerrit), 2014-12-23 20:45:54]

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

[Reilly Grant (use Gerrit), 2014-12-23 20:45:54]

Renaud, please take a look at this patch.

[rpaquay, 2014-12-23 21:24:07]

lgtm

[Reilly Grant (use Gerrit), 2014-12-23 21:27:32]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2014-12-23 21:27:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/827433002/1

[commit-bot: I haz the power, 2014-12-23 21:35:01]

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

[commit-bot: I haz the power, 2014-12-23 21:35:02]

Try jobs failed on following builders:
  android_chromium_gn_compile_dbg on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_chromiu...)

[Reilly Grant (use Gerrit), 2014-12-23 23:29:41]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2014-12-23 23:29:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/827433002/1

[commit-bot: I haz the power, 2014-12-23 23:39:23]

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

[commit-bot: I haz the power, 2014-12-23 23:39:24]

Try jobs failed on following builders:
  android_chromium_gn_compile_dbg on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/android_chromiu...)

[Reilly Grant (use Gerrit), 2014-12-24 01:25:12]

The CQ bit was checked by reillyg@chromium.org

[commit-bot: I haz the power, 2014-12-24 01:26:25]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/827433002/1

[commit-bot: I haz the power, 2014-12-24 01:27:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-12-24 01:28:22]

Patchset 1 (id:??) landed as
https://crrev.com/75c69eaf605093e4654ff16ac77b93630165ab61
Cr-Commit-Position: refs/heads/master@{#309598}