[cleanup] Split ForOf and ForIn AST nodes apart as they share little

src/ast/ast-expression-visitor.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/ast/ast-expression-visitor.h"
 
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
@@ skipping 152 matching lines @@
 }
 
 
 void AstExpressionVisitor::VisitForInStatement(ForInStatement* stmt) {
   RECURSE(Visit(stmt->enumerable()));
   RECURSE(Visit(stmt->body()));
 }
 
 
 void AstExpressionVisitor::VisitForOfStatement(ForOfStatement* stmt) {
-  RECURSE(Visit(stmt->iterable()));
   RECURSE(Visit(stmt->assign_iterator()));
   RECURSE(Visit(stmt->next_result()));
   RECURSE(Visit(stmt->result_done()));
   RECURSE(Visit(stmt->assign_each()));
   RECURSE(Visit(stmt->body()));
 }
 
 
 void AstExpressionVisitor::VisitTryCatchStatement(TryCatchStatement* stmt) {
   RECURSE(Visit(stmt->try_block()));
@@ skipping 217 matching lines @@
 
 void AstExpressionVisitor::VisitRewritableExpression(
     RewritableExpression* expr) {
   VisitExpression(expr);
   RECURSE(Visit(expr->expression()));
 }
 
 
 }  // namespace internal
 }  // namespace v8