Add usb_detachable_whitelist to device policy proto

chrome/browser/chromeos/policy/proto/chrome_device_policy.proto

 // Copyright 2013 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.
 
 syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;
 
 package enterprise_management;
 
@@ skipping 649 matching lines @@
 // endpoint or return back to the default GAIA flow.
 message LoginAuthenticationBehaviorProto {
   enum LoginBehavior {
     GAIA = 0;
     SAML_INTERSTITIAL = 1;
   };
   
   optional LoginBehavior login_authentication_behavior = 1 [default = GAIA];
 }
 
+// Identifiers of a USB device or device family.
+message UsbDeviceIdProto {
+  // USB Vendor Identifier (aka idVendor).
+  optional int32 vendor_id = 1;
+  // USB Product Identifier (aka idProduct).
+  optional int32 product_id = 2;
+}
+
+// This setting contains the list of USB devices to detach from the kernel
+// drivers in order to use them in web applications.
+// The list is used by the permission_broker daemon.
+message UsbDetachableWhitelistProto {
+  repeated UsbDeviceIdProto id = 1;
+}
+
 message ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
   optional GuestModeEnabledProto guest_mode_enabled = 3;
   optional OBSOLETE_DeviceProxySettingsProto device_proxy_settings = 4
       [deprecated = true];
   optional CameraEnabledProto camera_enabled = 5;
   optional ShowUserNamesOnSigninProto show_user_names = 6;
   optional DataRoamingEnabledProto data_roaming_enabled = 7;
   optional AllowNewUsersProto allow_new_users = 8;
@@ skipping 27 matching lines @@
   optional RebootOnShutdownProto reboot_on_shutdown = 34;
   optional DeviceHeartbeatSettingsProto device_heartbeat_settings = 35;
   optional ExtensionCacheSizeProto extension_cache_size = 36;
   optional LoginScreenDomainAutoCompleteProto
       login_screen_domain_auto_complete = 37;
   optional DeviceLogUploadSettingsProto device_log_upload_settings = 38;
   optional DisplayRotationDefaultProto display_rotation_default = 39;
   optional AllowKioskAppControlChromeVersionProto
       allow_kiosk_app_control_chrome_version = 40;
   optional LoginAuthenticationBehaviorProto login_authentication_behavior = 41;
+  optional UsbDetachableWhitelistProto usb_detachable_whitelist = 42;
 }