[es6] implement spread calls

src/ast-numbering.cc

Index: src/ast-numbering.cc
diff --git a/src/ast-numbering.cc b/src/ast-numbering.cc
index ea25ad8bbca4722f0deeb89be9f40a1d77004757..c5479aa5e86c86cc8b83015e189c0c9860740ab2 100644
--- a/src/ast-numbering.cc
+++ b/src/ast-numbering.cc
@@ -358,6 +358,13 @@ void AstNumberingVisitor::VisitCompareOperation(CompareOperation* node) {
 }
 
 
+void AstNumberingVisitor::VisitSpreadOperation(SpreadOperation* node) {
+  IncrementNodeCount();
+  node->set_base_id(ReserveIdRange(SpreadOperation::num_ids()));
+  Visit(node->expression());
+}
+
+
 void AstNumberingVisitor::VisitForInStatement(ForInStatement* node) {
   IncrementNodeCount();
   DisableSelfOptimization();