[strong] Disallow implicit conversions for binary arithmetic operations

src/ic/ic.h

Index: src/ic/ic.h
diff --git a/src/ic/ic.h b/src/ic/ic.h
index 712b695abb76bc0ba4e8d5fadc808dd07dbafd2e..df8a98c40e6ea4e2fb7833bd0c9e2cb593a58ba4 100644
--- a/src/ic/ic.h
+++ b/src/ic/ic.h
@@ -682,7 +682,8 @@ class BinaryOpIC : public IC {
  public:
   explicit BinaryOpIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {}
 
-  static Builtins::JavaScript TokenToJSBuiltin(Token::Value op);
+  static Builtins::JavaScript TokenToJSBuiltin(Token::Value op,
+                                               LanguageMode language_mode);
 
   MaybeHandle<Object> Transition(Handle<AllocationSite> allocation_site,
                                  Handle<Object> left,