Revert of Don't use different function scopes when parsing with temp zones

src/parsing/preparser.cc

Index: src/parsing/preparser.cc
diff --git a/src/parsing/preparser.cc b/src/parsing/preparser.cc
index 2e6e33f06de7945ee985bbbba55c151ca71251b5..66002b5b0b6a8205c16cafe6541bae98739cc584 100644
--- a/src/parsing/preparser.cc
+++ b/src/parsing/preparser.cc
@@ -307,7 +307,7 @@
   }
 
   LanguageMode class_language_mode = language_mode();
-  BlockState block_state(zone(), &scope_state_);
+  BlockState block_state(&scope_state_);
   scope()->SetLanguageMode(
       static_cast<LanguageMode>(class_language_mode | STRICT));
   // TODO(marja): Make PreParser use scope names too.