Rescope arrow-function parameter lists by moving the delta to the parameter scope

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 540 matching lines @@
                                     Expression* initializer,
                                     int initializer_end_position, bool is_rest);
   V8_INLINE void DeclareFormalParameter(
       Scope* scope, const ParserFormalParameters::Parameter& parameter,
       Type::ExpressionClassifier* classifier);
   void ParseArrowFunctionFormalParameters(ParserFormalParameters* parameters,
                                           Expression* params, int end_pos,
                                           bool* ok);
   void ParseArrowFunctionFormalParameterList(
       ParserFormalParameters* parameters, Expression* params,
-      const Scanner::Location& params_loc,
-      Scanner::Location* duplicate_loc, bool* ok);
+      const Scanner::Location& params_loc, Scanner::Location* duplicate_loc,
+      Scope::Snapshot& scope_snapshot, bool* ok);
 
   V8_INLINE Expression* ParseAsyncFunctionExpression(bool* ok);
 
   V8_INLINE DoExpression* ParseDoExpression(bool* ok);
 
   void ReindexLiterals(const ParserFormalParameters& parameters);
 
   // Temporary glue; these functions will move to ParserBase.
   Expression* ParseV8Intrinsic(bool* ok);
   FunctionLiteral* ParseFunctionLiteral(
@@ skipping 745 matching lines @@
 
 DoExpression* ParserTraits::ParseDoExpression(bool* ok) {
   return parser_->ParseDoExpression(ok);
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARSER_H_