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

extensions/common/api/usb_private.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.usbPrivate</code> API to interact with connected USB
 // devices. This API provides private extensions to the <code>chrome.usb</code>
 // API which should only be available to trusted pages.
 namespace usbPrivate {
 
-  // Properties for matching devices. A device matches of any of its interfaces
-  // match the given properties. An empty dictionary matches any device.
-  dictionary DeviceFilter {
-    // Device-level matching criteria:
-    long? vendorId;
-    // Checked only if the vendorId matches.
-    long? productId;
-
-    // Per-interface matching criteria:
-    long? interfaceClass;
-    // Checked only if the interfaceClass matches.
-    long? interfaceSubclass;
-    // Checked only if the interfaceSubclass matches.
-    long? interfaceProtocol;
-  };
-
   dictionary DeviceInfo {
     long vendorId;  // idVendor from the device
     long productId;  // idProduct from the device
 
     // Vendor and product names from an internal database.
     DOMString? vendorName;
     DOMString? productName;
 
     // iManufacturer, iProduct and iSerial strings from the device.
     DOMString? manufacturerString;
     DOMString? productString;
     DOMString? serialString;
   };
 
   callback GetDevicesCallback = void (long[] deviceIds);
   callback GetDeviceInfoCallback = void (DeviceInfo deviceInfo);
 
   interface Functions {
     // Lists USB devices matching any of the given filters.
     // |filters|: The properties to search for on target devices.
     // |callback|: Invoked with a list of device IDs on complete.
-    static void getDevices(DeviceFilter[] filters,
+    static void getDevices(usb.DeviceFilter[] filters,
                            GetDevicesCallback callback);
 
     // Gets basic display information about a device.
     // |deviceId|: The device ID (from |getDevices|).
     // |callback|: Invoked with |DeviceInfo| from the device.
     static void getDeviceInfo(long deviceId, GetDeviceInfoCallback callback);
   };
 };