Ensure settings returned from Content Settings providers are valid

chrome/browser/content_settings/content_settings_policy_provider_unittest.cc

 // Copyright (c) 2011 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 "components/content_settings/core/browser/content_settings_policy_provider.h"
 
 #include <memory>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 263 matching lines @@
 
   ASSERT_EQ(base::Value::Type::DICTIONARY, cert_filter->GetType());
   base::DictionaryValue* dict_value =
       static_cast<base::DictionaryValue*>(cert_filter.get());
   std::string actual_common_name;
   ASSERT_TRUE(dict_value->GetString("ISSUER.CN", &actual_common_name));
   EXPECT_EQ("issuer name", actual_common_name);
   provider.ShutdownOnUIThread();
 }
 
+TEST_F(PolicyProviderTest, InvalidManagedDefaultContentSetting) {
+  TestingProfile profile;
+  sync_preferences::TestingPrefServiceSyncable* prefs =
+      profile.GetTestingPrefService();
+  PolicyProvider provider(prefs);
+
+  prefs->SetManagedPref(
+      prefs::kManagedDefaultCookiesSetting,
+      base::MakeUnique<base::Value>(CONTENT_SETTING_DETECT_IMPORTANT_CONTENT));
+
+  // The setting provided in the cookies pref is not valid for cookies. It
+  // should be ignored.
+  std::unique_ptr<RuleIterator> rule_iterator(provider.GetRuleIterator(
+      CONTENT_SETTINGS_TYPE_COOKIES, std::string(), false));
+  EXPECT_FALSE(rule_iterator);
+
+  provider.ShutdownOnUIThread();
+}
+
 }  // namespace content_settings