[turbofan] Constant-fold JSGetSuperConstructor.

src/compiler/js-native-context-specialization.h

Index: src/compiler/js-native-context-specialization.h
diff --git a/src/compiler/js-native-context-specialization.h b/src/compiler/js-native-context-specialization.h
index 7fedf32e9281523446987f7d86c98fd7c1480cd4..436949596ca2dfc66bc7113f906adfcd72aae57b 100644
--- a/src/compiler/js-native-context-specialization.h
+++ b/src/compiler/js-native-context-specialization.h
@@ -53,6 +53,7 @@ class JSNativeContextSpecialization final : public AdvancedReducer {
   Reduction Reduce(Node* node) final;
 
  private:
+  Reduction ReduceJSGetSuperConstructor(Node* node);
   Reduction ReduceJSInstanceOf(Node* node);
   Reduction ReduceJSOrdinaryHasInstance(Node* node);
   Reduction ReduceJSLoadContext(Node* node);