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

chrome/browser/chromeos/extensions/device_local_account_external_policy_loader_unittest.cc

 // Copyright 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/chromeos/extensions/device_local_account_external_policy_loader.h"
 
 #include <string>
+#include <utility>
 
 #include "base/callback.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 158 matching lines @@
 
 void DeviceLocalAccountExternalPolicyLoaderTest::SetForceInstallListPolicy() {
   std::unique_ptr<base::ListValue> forcelist(new base::ListValue);
   forcelist->AppendString("invalid");
   forcelist->AppendString(base::StringPrintf(
       "%s;%s",
       kExtensionId,
       extension_urls::GetWebstoreUpdateUrl().spec().c_str()));
   store_.policy_map_.Set(policy::key::kExtensionInstallForcelist,
                          policy::POLICY_LEVEL_MANDATORY,
-                         policy::POLICY_SCOPE_USER,
-                         policy::POLICY_SOURCE_CLOUD,
-                         forcelist.release(),
-                         NULL);
+                         policy::POLICY_SCOPE_USER, policy::POLICY_SOURCE_CLOUD,
+                         std::move(forcelist), nullptr);
   store_.NotifyStoreLoaded();
 }
 
 // Verifies that when the cache is not explicitly started, the loader does not
 // serve any extensions, even if the force-install list policy is set or a load
 // is manually requested.
 TEST_F(DeviceLocalAccountExternalPolicyLoaderTest, CacheNotStarted) {
   // Set the force-install list policy.
   SetForceInstallListPolicy();
 
@@ skipping 113 matching lines @@
   loader_->StopCache(shutdown_run_loop.QuitClosure());
   VerifyAndResetVisitorCallExpectations();
 
   // Spin the loop until the cache shutdown callback is invoked. Verify that at
   // that point, no further file I/O tasks are pending.
   shutdown_run_loop.Run();
   EXPECT_TRUE(base::MessageLoop::current()->IsIdleForTesting());
 }
 
 }  // namespace chromeos