[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..d9027b45c5f2803aecd21b09862e2cb9e6151576 100644
--- a/src/ast/scopes.h
+++ b/src/ast/scopes.h
@@ -113,6 +113,11 @@ class V8_EXPORT_PRIVATE Scope : public NON_EXPORTED_BASE(ZoneObject) {
   // tree and its children are reparented.
   Scope* FinalizeBlockScope();
 
+  bool HasBeenRemoved() const;
+
+  // Find the first scope that hasn't been removed.
+  Scope* GetUnremovedScope();
+
   // 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.