Remove //device/devices_app.

device/usb/public/interfaces/permission_provider.mojom

 // Copyright 2015 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.
 
 module device.usb;
 
 import "device.mojom";
 
 interface PermissionProvider {
   // Filters a set of |requested_devices| down to the set of |allowed_guids|
   // that should be accessible to clients of the DeviceManager instance.
   HasDevicePermission(array<DeviceInfo> requested_devices)
       => (array<string> allowed_guids);
 
   // Returns whether or not the client has permission to access
   // |requested_configuration| on |device|.
   HasConfigurationPermission(uint8 requested_configuration,
                              DeviceInfo device) => (bool allowed);
 
   // Returns whether or not the client has permission to access
   // |requested_interface| on |device| when it is in configuration
   // |configuration_value|.
   HasInterfacePermission(uint8 requested_interface,
                          uint8 configuration_value,
                          DeviceInfo device) => (bool allowed);
 
   // Requests a new binding to this service.
   Bind(PermissionProvider& request);
 };