Rewrite simple uses of base::ListValue::Append(base::Value*) on CrOS.

chrome/browser/chromeos/proxy_config_service_impl_unittest.cc

Index: chrome/browser/chromeos/proxy_config_service_impl_unittest.cc
diff --git a/chrome/browser/chromeos/proxy_config_service_impl_unittest.cc b/chrome/browser/chromeos/proxy_config_service_impl_unittest.cc
index 4443236315667986213c9944207e902a12db999b..e2f4b2719b29a42e8a4ca01030d417c9da4557e6 100644
--- a/chrome/browser/chromeos/proxy_config_service_impl_unittest.cc
+++ b/chrome/browser/chromeos/proxy_config_service_impl_unittest.cc
@@ -6,6 +6,7 @@
 
 #include <stddef.h>
 
+#include <utility>
 #include <vector>
 
 #include "base/format_macros.h"
@@ -513,7 +514,7 @@ TEST_F(ProxyConfigServiceImplTest, SharedEthernetAndUserPolicy) {
       chromeos::onc::ReadDictionaryFromJson(kEthernetPolicy));
 
   std::unique_ptr<base::ListValue> network_configs(new base::ListValue);
-  network_configs->Append(ethernet_policy.release());
+  network_configs->Append(std::move(ethernet_policy));
 
   profile_prefs_.SetUserPref(prefs::kUseSharedProxies,
                              new base::FundamentalValue(false));