Revert of Put Scopes into temporary Zone

src/parsing/parser-base.h

Index: src/parsing/parser-base.h
diff --git a/src/parsing/parser-base.h b/src/parsing/parser-base.h
index 10c36aa917582687057a5d836ffad0f9ea1f441c..7bde0a721bf8f3c4f07bdbbb4c3ac55229652c35 100644
--- a/src/parsing/parser-base.h
+++ b/src/parsing/parser-base.h
@@ -472,11 +472,7 @@
       return &non_patterns_to_rewrite_;
     }
 
-    bool next_function_is_parenthesized() const {
-      return next_function_is_parenthesized_;
-    }
-
-    void set_next_function_is_parenthesized(bool parenthesized) {
+    void next_function_is_parenthesized(bool parenthesized) {
       next_function_is_parenthesized_ = parenthesized;
     }
 
@@ -1249,8 +1245,6 @@
   bool allow_harmony_async_await_;
   bool allow_harmony_restrictive_generators_;
   bool allow_harmony_trailing_commas_;
-
-  friend class DiscardableZoneScope;
 };
 
 template <class Traits>
@@ -1644,8 +1638,8 @@
       }
       // Heuristically try to detect immediately called functions before
       // seeing the call parentheses.
-      function_state_->set_next_function_is_parenthesized(peek() ==
-                                                          Token::FUNCTION);
+      function_state_->next_function_is_parenthesized(peek() ==
+                                                      Token::FUNCTION);
       ExpressionT expr = this->ParseExpression(true, classifier, CHECK_OK);
       Expect(Token::RPAREN, CHECK_OK);
       return expr;