Add more generic filters to the chrome.usb.getDevices API.

Add more generic filters to the chrome.usb.getDevices API.

Instead of specifying each of the USB vendor and product ID pairs an
app has permission to open this API extension allows filtering of
devices by vendor and product IDs as well as USB interface classes, sub-
classes and protocols. The 'vendorId' and 'productId' properties of
EnumerateDevicesOptions are still supported for backwards compatibility.

BUG=

Committed: https://crrev.com/7c403e06d1b61459b19434df22ca538216a4ba93
Cr-Commit-Position: refs/heads/master@{#293032}

[Reilly Grant (use Gerrit), 2014-08-29 02:22:29]

reillyg@chromium.org changed reviewers:
+ kalman@chromium.org, rockot@chromium.org, rpaquay@chromium.org

[Reilly Grant (use Gerrit), 2014-08-29 22:56:05]

I've cleaned up the USB API documentation.

[Ken Rockot(use gerrit already), 2014-09-02 21:25:38]

lgtm with doc nit

https://codereview.chromium.org/517923002/diff/20001/extensions/common/api/us...
File extensions/common/api/usb.idl (right):

https://codereview.chromium.org/517923002/diff/20001/extensions/common/api/us...
extensions/common/api/usb.idl:300: // Try to reset the USB device.
Please make the tense of these overview descriptions consistent (i.e., either
all "tries"/"performs" or "try"/"perform"). I forget which is standard.

[Reilly Grant (use Gerrit), 2014-09-02 22:02:59]

The CQ bit was checked by reillyg@chromium.org

[Reilly Grant (use Gerrit), 2014-09-02 22:03:36]

https://codereview.chromium.org/517923002/diff/20001/extensions/common/api/us...
File extensions/common/api/usb.idl (right):

https://codereview.chromium.org/517923002/diff/20001/extensions/common/api/us...
extensions/common/api/usb.idl:300: // Try to reset the USB device.
On 2014/09/02 21:25:38, Ken Rockot wrote:
> Please make the tense of these overview descriptions consistent (i.e., either
> all "tries"/"performs" or "try"/"perform"). I forget which is standard.

Done. Function comments are descriptive.

[commit-bot: I haz the power, 2014-09-02 22:07:46]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/reillyg@chromium.org/517923002/40001

[commit-bot: I haz the power, 2014-09-03 00:53:22]

Committed patchset #3 (id:40001) as 227ba73ed5392fe061411d5db103b32183e5d9de

[commit-bot: I haz the power, 2014-09-10 03:22:17]

Patchset 3 (id:??) landed as
https://crrev.com/7c403e06d1b61459b19434df22ca538216a4ba93
Cr-Commit-Position: refs/heads/master@{#293032}