[builtins] Introduce DeleteProperty builtin

src/full-codegen/s390/full-codegen-s390.cc

Index: src/full-codegen/s390/full-codegen-s390.cc
diff --git a/src/full-codegen/s390/full-codegen-s390.cc b/src/full-codegen/s390/full-codegen-s390.cc
index 60cbcb3cfb3a36a18acd2d7f48700107a162a2a8..566ba32d7c092b43f8a86906ef9b649cf509c654 100644
--- a/src/full-codegen/s390/full-codegen-s390.cc
+++ b/src/full-codegen/s390/full-codegen-s390.cc
@@ -2207,9 +2207,8 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
       if (property != NULL) {
         VisitForStackValue(property->obj());
         VisitForStackValue(property->key());
-        CallRuntimeWithOperands(is_strict(language_mode())
-                                    ? Runtime::kDeleteProperty_Strict
-                                    : Runtime::kDeleteProperty_Sloppy);
+        PushOperand(Smi::FromInt(language_mode()));
+        CallRuntimeWithOperands(Runtime::kDeleteProperty);
         context()->Plug(r2);
       } else if (proxy != NULL) {
         Variable* var = proxy->var();
@@ -2221,7 +2220,8 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
           __ LoadGlobalObject(r4);
           __ mov(r3, Operand(var->name()));
           __ Push(r4, r3);
-          __ CallRuntime(Runtime::kDeleteProperty_Sloppy);
+          __ Push(Smi::FromInt(SLOPPY));
+          __ CallRuntime(Runtime::kDeleteProperty);
           context()->Plug(r2);
         } else {
           DCHECK(!var->IsLookupSlot());