Fix cloud policy duplicate registrations issue.

chrome/browser/policy/test_utils.cc

+// Copyright (c) 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.
+
+#include "chrome/browser/policy/test_utils.h"
+
+#include <string>
+
+#include "base/logging.h"
+#include "base/values.h"
+#include "chrome/browser/policy/policy_map.h"
+#include "chrome/browser/policy/policy_service.h"
+
+namespace policy {
+
+bool PolicyServiceIsEmpty(const PolicyService* service) {
+  const PolicyMap& map = service->GetPolicies(
+      PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()));
+  if (!map.empty()) {
+    base::DictionaryValue dict;
+    for (PolicyMap::const_iterator it = map.begin(); it != map.end(); ++it)
+      dict.SetWithoutPathExpansion(it->first, it->second.value->DeepCopy());
+    LOG(WARNING) << "There are pre-existing policies in this machine: " << dict;
+  }
+  return map.empty();
+}
+
+}  // namespace policy