Hide Isolate pointer from embedder

runtime/vm/object.cc

Index: runtime/vm/object.cc
diff --git a/runtime/vm/object.cc b/runtime/vm/object.cc
index f4f90c6b9e0c26e5f416f1212526882cabb6c5d2..44466e6370111255f0453f2abf7ade48ef38c4a9 100644
--- a/runtime/vm/object.cc
+++ b/runtime/vm/object.cc
@@ -20115,7 +20115,7 @@ void Capability::PrintJSONImpl(JSONStream* stream, bool ref) const {
 RawReceivePort* ReceivePort::New(Dart_Port id,
                                  bool is_control_port,
                                  Heap::Space space) {
-  ASSERT(id != ILLEGAL_PORT);
+  ASSERT(id != DART_ILLEGAL_PORT);
   Isolate* isolate = Isolate::Current();
   const SendPort& send_port =
       SendPort::Handle(isolate, SendPort::New(id, isolate->origin_id()));
@@ -20156,7 +20156,7 @@ RawSendPort* SendPort::New(Dart_Port id, Heap::Space space) {
 RawSendPort* SendPort::New(Dart_Port id,
                            Dart_Port origin_id,
                            Heap::Space space) {
-  ASSERT(id != ILLEGAL_PORT);
+  ASSERT(id != DART_ILLEGAL_PORT);
   SendPort& result = SendPort::Handle();
   {
     RawObject* raw = Object::Allocate(SendPort::kClassId,