[strong] Refactor ObjectStrength into a replacement for strong boolean args

src/compiler/js-typed-lowering.cc

Index: src/compiler/js-typed-lowering.cc
diff --git a/src/compiler/js-typed-lowering.cc b/src/compiler/js-typed-lowering.cc
index 2f0497f50393415217b011aa4c71a9a1a3b66f8a..04e76dbaf75320798d9d757dc26fc4260b287ddb 100644
--- a/src/compiler/js-typed-lowering.cc
+++ b/src/compiler/js-typed-lowering.cc
@@ -193,7 +193,7 @@ class JSBinopReduction final {
     return ChangeToPureOperator(op, false, type);
   }
 
-  bool IsStrong() { return is_strong(OpParameter<LanguageMode>(node_)); }
+  bool IsStrong() { return is_strong(OpParameter<Strength>(node_)); }
 
   bool OneInputIs(Type* t) { return left_type()->Is(t) || right_type()->Is(t); }