Remove stl_util's deletion functions from chromeos/.

chromeos/network/policy_applicator.h

Index: chromeos/network/policy_applicator.h
diff --git a/chromeos/network/policy_applicator.h b/chromeos/network/policy_applicator.h
index 3dd5fac24fcb1b6c4bea83bf92b4a4bd181d1e69..54368b76bc3163d5cd56117a09cf12b2b80ca2fe 100644
--- a/chromeos/network/policy_applicator.h
+++ b/chromeos/network/policy_applicator.h
@@ -47,7 +47,8 @@ class PolicyApplicator {
     DISALLOW_ASSIGN(ConfigurationHandler);
   };
 
-  typedef std::map<std::string, const base::DictionaryValue*> GuidToPolicyMap;
+  using GuidToPolicyMap =
+      std::map<std::string, std::unique_ptr<base::DictionaryValue>>;
 
   // |handler| must outlive this object.
   // |modified_policies| must not be NULL and will be empty afterwards.