Wire the device requisition parameter for enterprise enrollment.

chrome/browser/policy/proto/cloud/device_management_backend.proto

 // Copyright (c) 2012 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 26 matching lines @@
   // Machine model name, such as "ZGA", "Cr-48", "Nexus One".  If the
   // model name is not available, client SHOULD send generic name like
   // "Android", or "Chrome OS".
   optional string machine_model = 4;
 
   // When true, indicates that the |machine_id| has been identified as auto-
   // enrollment candidate on the client and the server can use it to verify
   // that the client is to be enrolled in the correct mode.
   // Defaults to false when not present.
   optional bool auto_enrolled = 5;
+
+  // Indicates a requisition of the registering entity that the server can act
+  // upon. This allows clients to pass hints e.g. at device enrollment time
+  // about the intended use of the device.
+  optional string requisition = 6;
 }
 
 // Response from server to device register request.
 message DeviceRegisterResponse {
   // Device management token for this registration.  This token MUST be
   // part of HTTP Authorization header for all future requests from
   // device to server.
   required string device_management_token = 1;
 
   // Device display name.  By default, server generates the name in
@@ skipping 494 matching lines @@
 
   // Auto-enrollment detection response.
   optional DeviceAutoEnrollmentResponse auto_enrollment_response = 8;
 
   // EMCert upload response.
   optional DeviceCertUploadResponse cert_upload_response = 9;
 
   // Response to OAuth2 authorization code request.
   optional DeviceServiceApiAccessResponse service_api_access_response = 10;
 }