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

chrome/browser/chromeos/login/saml/saml_browsertest.cc

Index: chrome/browser/chromeos/login/saml/saml_browsertest.cc
diff --git a/chrome/browser/chromeos/login/saml/saml_browsertest.cc b/chrome/browser/chromeos/login/saml/saml_browsertest.cc
index ebe85f263d22282e849c3e418f63bbe309d46ee4..6c19aa67019ec9279ba84caab298370b769d0894 100644
--- a/chrome/browser/chromeos/login/saml/saml_browsertest.cc
+++ b/chrome/browser/chromeos/login/saml/saml_browsertest.cc
@@ -1015,11 +1015,9 @@ void SAMLPolicyTest::SetUpOnMainThread() {
 void SAMLPolicyTest::SetSAMLOfflineSigninTimeLimitPolicy(int limit) {
   policy::PolicyMap user_policy;
   user_policy.Set(policy::key::kSAMLOfflineSigninTimeLimit,
-                  policy::POLICY_LEVEL_MANDATORY,
-                  policy::POLICY_SCOPE_USER,
+                  policy::POLICY_LEVEL_MANDATORY, policy::POLICY_SCOPE_USER,
                   policy::POLICY_SOURCE_CLOUD,
-                  new base::FundamentalValue(limit),
-                  NULL);
+                  base::WrapUnique(new base::FundamentalValue(limit)), nullptr);
   provider_.UpdateChromePolicy(user_policy);
   base::RunLoop().RunUntilIdle();
 }