new classes: assert that constructors are not callable and rewrite 'return;'

src/runtime/runtime-classes.cc

Index: src/runtime/runtime-classes.cc
diff --git a/src/runtime/runtime-classes.cc b/src/runtime/runtime-classes.cc
index 8a207a8eabcea60d5b12d844e1f97199495af936..ffd121e612ef4d3dd6572ce7dff205cf02139153 100644
--- a/src/runtime/runtime-classes.cc
+++ b/src/runtime/runtime-classes.cc
@@ -38,6 +38,15 @@ RUNTIME_FUNCTION(Runtime_ThrowUnsupportedSuperError) {
 }
 
 
+RUNTIME_FUNCTION(Runtime_ThrowConstructorNonCallableError) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 0);
+  THROW_NEW_ERROR_RETURN_FAILURE(
+      isolate,
+      NewTypeError("constructor_noncallable", HandleVector<Object>(NULL, 0)));
+}
+
+
 RUNTIME_FUNCTION(Runtime_ToMethod) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 2);