Add device path enumeration to the new Windows USB backend.

device/usb/usb_service_impl.h

Index: device/usb/usb_service_impl.h
diff --git a/device/usb/usb_service_impl.h b/device/usb/usb_service_impl.h
index e5467fb0b0c4ea99fcc2fd7b575484dba08da4fa..c644842aeba6f7a9dafa2e53da76a04fd38139ba 100644
--- a/device/usb/usb_service_impl.h
+++ b/device/usb/usb_service_impl.h
@@ -34,6 +34,8 @@ namespace device {
 typedef struct libusb_device* PlatformUsbDevice;
 typedef struct libusb_context* PlatformUsbContext;
 
+class UsbDeviceImpl;

[scheib, 2017/02/14 19:40:05]

You don't use this, at least in this patch.

[Reilly Grant (use Gerrit), 2017/02/15 22:03:13]

Changing headers broke compilation of this file which does require UsbDeviceImpl
to be defined.

+
 class UsbServiceImpl :
 #if defined(OS_WIN)
     public DeviceMonitorWin::Observer,