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

src/parsing/parameter-initializer-rewriter.h

Index: src/parsing/parameter-initializer-rewriter.h
diff --git a/src/parsing/parameter-initializer-rewriter.h b/src/parsing/parameter-initializer-rewriter.h
index 255534c99e73a6cdc26a425ea5cc3f28235259b4..65c3a3c7ead421907e842914c0814f9604bd315a 100644
--- a/src/parsing/parameter-initializer-rewriter.h
+++ b/src/parsing/parameter-initializer-rewriter.h
@@ -10,11 +10,15 @@
 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