Remove raw DictionaryValue::Set in //components

components/sync/syncable/syncable_id.cc

Index: components/sync/syncable/syncable_id.cc
diff --git a/components/sync/syncable/syncable_id.cc b/components/sync/syncable/syncable_id.cc
index 24d8dfdbde821416605a2006f3523e292456550e..14c7e58c8b9e3251d738cc36105aa4e571d42753 100644
--- a/components/sync/syncable/syncable_id.cc
+++ b/components/sync/syncable/syncable_id.cc
@@ -5,6 +5,7 @@
 #include "components/sync/syncable/syncable_id.h"
 
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/values.h"
 
 using std::ostream;
@@ -18,8 +19,8 @@ ostream& operator<<(ostream& out, const Id& id) {
   return out;
 }
 
-base::Value* Id::ToValue() const {
-  return new base::Value(s_);
+std::unique_ptr<base::Value> Id::ToValue() const {
+  return base::MakeUnique<base::Value>(s_);
 }
 
 string Id::GetServerId() const {