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

src/parsing/parameter-initializer-rewriter.h

 // 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.
 
 #ifndef V8_PARSING_PARAMETER_EXPRESSION_REWRITER_H_
 #define V8_PARSING_PARAMETER_EXPRESSION_REWRITER_H_
 
 #include "src/ast/ast.h"
 
 namespace v8 {
 namespace internal {
 
-
-void RewriteParameterInitializerScope(uintptr_t stack_limit,
-                                      Expression* initializer, Scope* old_scope,
-                                      Scope* new_scope);
-
+// When an extra declaration scope needs to be inserted to account for
+// a sloppy eval in a default parameter or function body, the expressions
+// needs to be in that new inner scope which was added after initial
+// parsing.
+//
+// param_scope is the new inner scope, and its outer_scope() is assumed
+// to be the function scope which was used during the initial parse.
+void ReparentParameterExpressionScope(uintptr_t stack_limit, Expression* expr,
+                                      Scope* param_scope);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_PARSING_PARAMETER_EXPRESSION_REWRITER_H_