Gender-neutralize a few more comments / strings.

components/policy/proto/device_management_backend.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 243 matching lines @@
 
   // [timestamp] is milliseconds since Epoch in UTC timezone. It is
   // included here so that the time at which the server issued this
   // response cannot be faked (as protection against replay attacks).
   // It is the timestamp generated by DMServer, NOT the time admin
   // last updated the policy or anything like that.
   optional int64 timestamp = 2;
 
   // The DM token that was used by the client in the HTTP POST header
   // for authenticating the request. It is included here again so that
-  // the client can verify that the response is meant for him (and not
+  // the client can verify that the response is meant for them (and not
   // issued by a replay or man-in-the-middle attack).
   optional string request_token = 3;
 
   // The serialized value of the actual policy protobuf.  This can be
   // deserialized to an instance of, for example, ChromeSettingsProto,
   // ChromeDeviceSettingsProto, or ExternalPolicyData.
   optional bytes policy_value = 4;
 
   // The device display name assigned by the server.  It is only
   // filled if the display name is available.
@@ skipping 942 matching lines @@
   // Response to update device attribute.
   optional DeviceAttributeUpdateResponse device_attribute_update_response = 16;
 
   // Response to GCM id update request.
   optional GcmIdUpdateResponse gcm_id_update_response = 17;
 
   // Response to check Android management request.
   optional CheckAndroidManagementResponse
       check_android_management_response = 18;
 }