Use std::unique_ptr for base::DictionaryValue and base::ListValue's internal store.

tools/json_schema_compiler/util.h

Index: tools/json_schema_compiler/util.h
diff --git a/tools/json_schema_compiler/util.h b/tools/json_schema_compiler/util.h
index 220ba80c77df5e3af43d5d2cca7fa347487d291a..8b852739f6a1078b5fca50e38612fdd49e4bf6b1 100644
--- a/tools/json_schema_compiler/util.h
+++ b/tools/json_schema_compiler/util.h
@@ -101,7 +101,7 @@ template <class T>
 bool PopulateArrayFromList(const base::ListValue& list, std::vector<T>* out) {
   out->clear();
   T item;
-  for (const base::Value* value : list) {
+  for (const auto& value : list) {
     if (!PopulateItem(*value, &item))
       return false;
     // T might not be movable, but in that case it should be copyable, and this
@@ -120,7 +120,7 @@ bool PopulateArrayFromList(const base::ListValue& list,
                            base::string16* error) {
   out->clear();
   T item;
-  for (const base::Value* value : list) {
+  for (const auto& value : list) {
     if (!PopulateItem(*value, &item, error))
       return false;
     out->push_back(std::move(item));