Replace SetObjectProperty / DefineObjectProperty with less powerful alternatives where relevant.

src/json-parser.h

Index: src/json-parser.h
diff --git a/src/json-parser.h b/src/json-parser.h
index 9234e85aa20d171fcad6a1f27a5317457debee1b..8ed2e84059cfb7aa9fe74e4ff0b3db16ae71cc45 100644
--- a/src/json-parser.h
+++ b/src/json-parser.h
@@ -434,7 +434,7 @@ Handle<Object> JsonParser<seq_one_byte>::ParseJsonObject() {
       // Commit the intermediate state to the object and stop transitioning.
       CommitStateToJsonObject(json_object, map, &properties);
 
-      Runtime::DefineObjectProperty(json_object, key, value, NONE).Check();
+      JSObject::DefinePropertyOrElement(json_object, key, value).Check();
     } while (transitioning && MatchSkipWhiteSpace(','));
 
     // If we transitioned until the very end, transition the map now.
@@ -470,7 +470,7 @@ Handle<Object> JsonParser<seq_one_byte>::ParseJsonObject() {
         value = ParseJsonValue();
         if (value.is_null()) return ReportUnexpectedCharacter();
 
-        Runtime::DefineObjectProperty(json_object, key, value, NONE).Check();
+        JSObject::DefinePropertyOrElement(json_object, key, value).Check();
       }
     }