Convert generated extension bindings to use base::Value::CreateDeepCopy

tools/json_schema_compiler/util.cc

Index: tools/json_schema_compiler/util.cc
diff --git a/tools/json_schema_compiler/util.cc b/tools/json_schema_compiler/util.cc
index dcb44ecb1323accbc16cc370ccbabb7c48f1379e..d1a16261d2a85ac3a8b2c9b29aaa34da357eda78 100644
--- a/tools/json_schema_compiler/util.cc
+++ b/tools/json_schema_compiler/util.cc
@@ -160,12 +160,12 @@ void AddItemToList(const std::vector<char>& from, base::ListValue* out) {
 
 void AddItemToList(const std::unique_ptr<base::Value>& from,
                    base::ListValue* out) {
-  out->Append(from->DeepCopy());
+  out->Append(from->CreateDeepCopy());
 }
 
 void AddItemToList(const std::unique_ptr<base::DictionaryValue>& from,
                    base::ListValue* out) {
-  out->Append(static_cast<base::Value*>(from->DeepCopy()));
+  out->Append(from->CreateDeepCopy());
 }
 
 std::string ValueTypeToString(base::Value::Type type) {