Remove redundant/unnecessary variables and checks in ParseForStatement

src/ast/ast.h

 // Copyright 2012 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.
 
 #ifndef V8_AST_AST_H_
 #define V8_AST_AST_H_
 
 #include "src/assembler.h"
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/modules.h"
@@ skipping 813 matching lines @@
   Expression* each() const { return each_; }
   Expression* subject() const { return subject_; }
 
   void set_each(Expression* e) { each_ = e; }
   void set_subject(Expression* e) { subject_ = e; }
 
   void AssignFeedbackVectorSlots(Isolate* isolate, FeedbackVectorSpec* spec,
                                  FeedbackVectorSlotCache* cache) override;
   FeedbackVectorSlot EachFeedbackSlot() const { return each_slot_; }
 
+  static const char* VisitModeString(VisitMode mode) {
+    return mode == ITERATE ? "for-of" : "for-in";
+  }
+
  protected:
   ForEachStatement(Zone* zone, ZoneList<const AstRawString*>* labels, int pos)
       : IterationStatement(zone, labels, pos), each_(NULL), subject_(NULL) {}
 
  private:
   Expression* each_;
   Expression* subject_;
   FeedbackVectorSlot each_slot_;
 };
 
@@ skipping 2717 matching lines @@
   // the parser-level zone.
   Zone* parser_zone_;
   AstValueFactory* ast_value_factory_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_AST_H_