Migrate WebUSB LayoutTests into external/wpt

third_party/WebKit/LayoutTests/external/wpt/webusb/resources/fake-devices.js

 'use strict';
 
 function fakeUsbDevices() {
   return define('Fake USB Devices', [

[ortuno, 2017/04/03 01:47:19]

This is chrome specific so I don't think we can upstream it. 

[Reilly Grant (use Gerrit), 2017/04/05 18:39:37]

Good catch. I forgot to remove that when I switched all the tests to
fakeDeviceInit.

     'device/usb/public/interfaces/device.mojom',
   ], device => Promise.resolve([
     {
       guid: 'CD9FA048-FC9B-7A71-DBFC-FD44B78D6397',
       usb_version_major: 2,
       usb_version_minor: 0,
       usb_version_subminor: 0,
       class_code: 7,
       subclass_code: 1,
       protocol_code: 2,
@@ skipping 186 matching lines @@
         }, {
           endpointNumber: 1,
           direction: 'out',
           type: 'isochronous',
           packetSize: 1024
         }]
       }]
     }]
   }]
 };