Add ManagementMode enum and GetManagementMode().

chrome/browser/chromeos/policy/policy_util.cc

+// 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.
+
+#include "chrome/browser/chromeos/policy/policy_util.h"
+
+namespace em = enterprise_management;
+
+namespace policy {
+
+em::PolicyData::ManagementMode GetManagementMode(
+    const em::PolicyData& policy_data) {
+  if (policy_data.has_management_mode())
+    return policy_data.management_mode();
+  if (policy_data.has_request_token())
+    return em::PolicyData::ENTERPRISE_MANAGED;
+  return em::PolicyData::LOCAL_OWNER;
+}
+
+}  // namespace policy