Remove redundant/unnecessary variables and checks in ParseForStatement

src/parsing/parser.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_PARSING_PARSER_H_
 #define V8_PARSING_PARSER_H_
 
 #include "src/allocation.h"
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
@@ skipping 892 matching lines @@
   //     %ThrowIteratorResultNotAnObject(result)
   Expression* BuildIteratorNextResult(Expression* iterator, Variable* result,
                                       int pos);
 
 
   // Initialize the components of a for-in / for-of statement.
   void InitializeForEachStatement(ForEachStatement* stmt, Expression* each,
                                   Expression* subject, Statement* body,
                                   bool is_destructuring);
   Statement* DesugarLexicalBindingsInForStatement(
-      Scope* inner_scope, bool is_const, ZoneList<const AstRawString*>* names,
-      ForStatement* loop, Statement* init, Expression* cond, Statement* next,
-      Statement* body, bool* ok);
+      Scope* inner_scope, VariableMode mode,
+      ZoneList<const AstRawString*>* names, ForStatement* loop, Statement* init,
+      Expression* cond, Statement* next, Statement* body, bool* ok);
 
   void RewriteDoExpression(Expression* expr, bool* ok);
 
   FunctionLiteral* ParseFunctionLiteral(
       const AstRawString* name, Scanner::Location function_name_location,
       FunctionNameValidity function_name_validity, FunctionKind kind,
       int function_token_position, FunctionLiteral::FunctionType type,
       FunctionLiteral::ArityRestriction arity_restriction,
       LanguageMode language_mode, bool* ok);
 
@@ skipping 286 matching lines @@
 
 DoExpression* ParserTraits::ParseDoExpression(bool* ok) {
   return parser_->ParseDoExpression(ok);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_H_