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

remoting/host/policy_watcher.cc

Index: remoting/host/policy_watcher.cc
diff --git a/remoting/host/policy_watcher.cc b/remoting/host/policy_watcher.cc
index 96727292f7fd98b3b7efd41526da4448bd92a17b..a6425e1574525e5408afb595f0fdd40886d18edb 100644
--- a/remoting/host/policy_watcher.cc
+++ b/remoting/host/policy_watcher.cc
@@ -90,16 +90,16 @@ std::unique_ptr<base::DictionaryValue> CopyChromotingPoliciesIntoDictionary(
   const char kPolicyNameSubstring[] = "RemoteAccessHost";
   std::unique_ptr<base::DictionaryValue> policy_dict(
       new base::DictionaryValue());
-  for (auto it = current.begin(); it != current.end(); ++it) {
-    const std::string& key = it->first;
-    const base::Value* value = it->second.value;
+  for (const auto& entry : current) {
+    const std::string& key = entry.first;
+    const base::Value* value = entry.second.value.get();
 
     // Copying only Chromoting-specific policies helps avoid false alarms
     // raised by NormalizePolicies below (such alarms shutdown the host).
     // TODO(lukasza): Removing this somewhat brittle filtering will be possible
     //                after having separate, Chromoting-specific schema.
     if (key.find(kPolicyNameSubstring) != std::string::npos) {
-      policy_dict->Set(key, value->DeepCopy());
+      policy_dict->Set(key, value->CreateDeepCopy());
     }
   }