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

components/policy/core/common/cloud/user_cloud_policy_manager_unittest.cc

Index: components/policy/core/common/cloud/user_cloud_policy_manager_unittest.cc
diff --git a/components/policy/core/common/cloud/user_cloud_policy_manager_unittest.cc b/components/policy/core/common/cloud/user_cloud_policy_manager_unittest.cc
index 051845acbb122c75e220c978e7d70d46697b8c40..60667fed07fe803124e6005ae716434dde1d2a2e 100644
--- a/components/policy/core/common/cloud/user_cloud_policy_manager_unittest.cc
+++ b/components/policy/core/common/cloud/user_cloud_policy_manager_unittest.cc
@@ -6,6 +6,7 @@
 
 #include "base/callback.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/sequenced_task_runner.h"
 #include "components/policy/core/common/cloud/cloud_external_data_manager.h"
@@ -34,12 +35,9 @@ class UserCloudPolicyManagerTest : public testing::Test {
 
   void SetUp() override {
     // Set up a policy map for testing.
-    policy_map_.Set("key",
-                    POLICY_LEVEL_MANDATORY,
-                    POLICY_SCOPE_USER,
+    policy_map_.Set("key", POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
                     POLICY_SOURCE_CLOUD,
-                    new base::StringValue("value"),
-                    NULL);
+                    base::WrapUnique(new base::StringValue("value")), nullptr);
     expected_bundle_.Get(PolicyNamespace(POLICY_DOMAIN_CHROME, std::string()))
         .CopyFrom(policy_map_);
   }