Partial revert of rest parameter desugaring.

src/compiler/ast-graph-builder.h

Index: src/compiler/ast-graph-builder.h
diff --git a/src/compiler/ast-graph-builder.h b/src/compiler/ast-graph-builder.h
index b89d6af164bd83a5faa3db2fdbebf9df2a525a4e..96c1a911565ce0c3fdcf427f886befb55cd00aa2 100644
--- a/src/compiler/ast-graph-builder.h
+++ b/src/compiler/ast-graph-builder.h
@@ -264,6 +264,9 @@ class AstGraphBuilder : public AstVisitor {
   // Builder to create an arguments object if it is used.
   Node* BuildArgumentsObject(Variable* arguments);
 
+  // Builder to create an array of rest parameters if used
+  Node* BuildRestArgumentsArray(Variable* rest, int index);
+
   // Builder that assigns to the {.this_function} internal variable if needed.
   Node* BuildThisFunctionVariable(Variable* this_function_var);