[parser] Fix scopes in rewriting of for-of and destructuring assignments.

src/ast/scopes.h

Index: src/ast/scopes.h
diff --git a/src/ast/scopes.h b/src/ast/scopes.h
index d5291183dd7726e8ed3abeca2e7dff7952982761..3df7bee084d45dc2bc8a9ace45b250ea5b2746ef 100644
--- a/src/ast/scopes.h
+++ b/src/ast/scopes.h
@@ -113,6 +113,8 @@ class V8_EXPORT_PRIVATE Scope : public NON_EXPORTED_BASE(ZoneObject) {
   // tree and its children are reparented.
   Scope* FinalizeBlockScope();
 
+  bool HasBeenRemoved() const;
+
   // Inserts outer_scope into this scope's scope chain (and removes this
   // from the current outer_scope_'s inner scope list).
   // Assumes outer_scope_ is non-null.