[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 a2bc65827d9ded4afdc131c0467d2dab6d0006f4..56be4ead9dd42029fb3599244a127d3e422f9326 100644
--- a/src/ast-numbering.cc
+++ b/src/ast-numbering.cc
@@ -365,6 +365,13 @@ 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();