Use std::unique_ptr to express ownership of base::Value in PolicyMap::Entry

chrome/browser/policy/policy_prefs_browsertest.cc

 // 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.
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <cstdlib>
 #include <map>
 #include <memory>
 #include <sstream>
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/json/json_reader.h"
 #include "base/logging.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "base/run_loop.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 484 matching lines @@
   }
 
   void SetProviderPolicy(const base::DictionaryValue& policies,
                          PolicyLevel level) {
     PolicyMap policy_map;
     for (base::DictionaryValue::Iterator it(policies);
          !it.IsAtEnd(); it.Advance()) {
       const PolicyDetails* policy_details = GetChromePolicyDetails(it.key());
       ASSERT_TRUE(policy_details);
       policy_map.Set(
-          it.key(),
-          level,
-          POLICY_SCOPE_USER,
-          POLICY_SOURCE_CLOUD,
-          it.value().DeepCopy(),
-          policy_details->max_external_data_size ?
-              new ExternalDataFetcher(base::WeakPtr<ExternalDataManager>(),
-                                      it.key()) :
-              NULL);
+          it.key(), level, POLICY_SCOPE_USER, POLICY_SOURCE_CLOUD,
+          it.value().CreateDeepCopy(),
+          base::WrapUnique(policy_details->max_external_data_size
+                               ? new ExternalDataFetcher(nullptr, it.key())
+                               : nullptr));
     }
     provider_.UpdateChromePolicy(policy_map);
     base::RunLoop().RunUntilIdle();
   }
 
   MockConfigurationPolicyProvider provider_;
 };
 
 // Verifies that policies make their corresponding preferences become managed,
 // and that the user can't override that setting.
@@ skipping 215 matching lines @@
       }
     }
   }
 }
 
 INSTANTIATE_TEST_CASE_P(PolicyPrefIndicatorTestInstance,
                         PolicyPrefIndicatorTest,
                         testing::ValuesIn(SplitPoliciesIntoChunks(10)));
 
 }  // namespace policy