Add support for reading USB descriptors to the new Windows backend.

device/usb/usb_descriptors.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DEVICE_USB_USB_DESCRIPTORS_H_
 #define DEVICE_USB_USB_DESCRIPTORS_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 115 matching lines @@
   // each).
   bool Parse(const std::vector<uint8_t>& buffer);
 
   uint16_t usb_version = 0;
   uint8_t device_class = 0;
   uint8_t device_subclass = 0;
   uint8_t device_protocol = 0;
   uint16_t vendor_id = 0;
   uint16_t product_id = 0;
   uint16_t device_version = 0;
+  uint8_t i_manufacturer = 0;
+  uint8_t i_product = 0;
+  uint8_t i_serial_number = 0;
   uint8_t num_configurations = 0;
   std::vector<UsbConfigDescriptor> configurations;
 };
 
 void ReadUsbDescriptors(
     scoped_refptr<UsbDeviceHandle> device_handle,
     const base::Callback<void(std::unique_ptr<UsbDeviceDescriptor>)>& callback);
 
 bool ParseUsbStringDescriptor(const std::vector<uint8_t>& descriptor,
                               base::string16* output);
 
 void ReadUsbStringDescriptors(
     scoped_refptr<UsbDeviceHandle> device_handle,
     std::unique_ptr<std::map<uint8_t, base::string16>> index_map,
     const base::Callback<
         void(std::unique_ptr<std::map<uint8_t, base::string16>>)>& callback);
 
 }  // namespace device
 
 #endif  // DEVICE_USB_USB_DESCRIPTORS_H_