Include USB device version in chrome.usb.Device fields.

extensions/common/api/usb.idl

 // 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.
 
 // Use the <code>chrome.usb</code> API to interact with connected USB
 // devices. This API provides access to USB operations from within the context
 // of an app. Using this API, apps can function as drivers for hardware devices.
 //
 // Errors generated by this API are reported by setting
 // $(ref:runtime.lastError) and executing the function's regular callback. The
@@ skipping 13 matching lines @@
   enum UsageType {data, feedback, explicitFeedback};
 
   dictionary Device {
     // An opaque ID for the USB device. It remains unchanged until the device is
     // unplugged.
     long device;
     // The device vendor ID.
     long vendorId;
     // The product ID.
     long productId;
+    // The device version (bcdDevice field).
+    long version;
     // The iProduct string read from the device, if available.
     DOMString productName;
     // The iManufacturer string read from the device, if available.
     DOMString manufacturerName;
     // The iSerialNumber string read from the device, if available.
     DOMString serialNumber;
   };
 
   dictionary ConnectionHandle {
     // An opaque handle representing this connection to the USB device and all
@@ skipping 348 matching lines @@
     // device. Permission may have been granted at install time, when the user
     // accepted an optional permission (see $(ref:permissions.request)), or
     // through $(ref:getUserSelectedDevices).
     static void onDeviceAdded(Device device);
 
     // Event generated when a device is removed from the system. See
     // $(ref:onDeviceAdded) for which events are delivered.
     static void onDeviceRemoved(Device device);
   };
 };