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

src/ast/ast-expression-rewriter.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/ast/ast.h"
 #include "src/ast/ast-expression-rewriter.h"
 
 namespace v8 {
 namespace internal {
 
@@ skipping 151 matching lines @@
 
 
 void AstExpressionRewriter::VisitForInStatement(ForInStatement* node) {
   AST_REWRITE_PROPERTY(Expression, node, each);
   AST_REWRITE_PROPERTY(Expression, node, subject);
   AST_REWRITE_PROPERTY(Statement, node, body);
 }
 
 
 void AstExpressionRewriter::VisitForOfStatement(ForOfStatement* node) {
-  AST_REWRITE_PROPERTY(Expression, node, each);
   AST_REWRITE_PROPERTY(Expression, node, assign_iterator);
   AST_REWRITE_PROPERTY(Expression, node, next_result);
   AST_REWRITE_PROPERTY(Expression, node, result_done);
   AST_REWRITE_PROPERTY(Expression, node, assign_each);
-  AST_REWRITE_PROPERTY(Expression, node, subject);
   AST_REWRITE_PROPERTY(Statement, node, body);
 }
 
 
 void AstExpressionRewriter::VisitTryCatchStatement(TryCatchStatement* node) {
   AST_REWRITE_PROPERTY(Block, node, try_block);
   // Not visiting the variable.
   AST_REWRITE_PROPERTY(Block, node, catch_block);
 }
 
@@ skipping 212 matching lines @@
 
 void AstExpressionRewriter::VisitRewritableExpression(
     RewritableExpression* node) {
   REWRITE_THIS(node);
   AST_REWRITE(Expression, node->expression(), node->Rewrite(replacement));
 }
 
 
 }  // namespace internal
 }  // namespace v8