Fix for issue 21398 (only send "literal like" objects across isolates spawned using spawnURI

runtime/vm/raw_object.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_RAW_OBJECT_H_
 #define VM_RAW_OBJECT_H_
 
 #include "platform/assert.h"
 #include "vm/atomic.h"
 #include "vm/globals.h"
@@ skipping 1798 matching lines @@
 // VM implementations of the basic types in the isolate.
 class RawCapability : public RawInstance {
   RAW_HEAP_OBJECT_IMPLEMENTATION(Capability);
   uint64_t id_;
 };
 
 
 class RawSendPort : public RawInstance {
   RAW_HEAP_OBJECT_IMPLEMENTATION(SendPort);
   Dart_Port id_;
+  Dart_Port origin_id_;
 
   friend class ReceivePort;
 };
 
 
 class RawReceivePort : public RawInstance {
   RAW_HEAP_OBJECT_IMPLEMENTATION(ReceivePort);
 
   RawObject** from() {
     return reinterpret_cast<RawObject**>(&ptr()->send_port_);
@@ skipping 323 matching lines @@
   COMPILE_ASSERT(kExternalTypedDataInt8ArrayCid ==
                  kTypedDataInt8ArrayViewCid + 15);
   COMPILE_ASSERT(kByteBufferCid == kExternalTypedDataInt8ArrayCid + 14);
   COMPILE_ASSERT(kNullCid == kByteBufferCid + 1);
   return (kNullCid - kTypedDataInt8ArrayCid);
 }
 
 }  // namespace dart
 
 #endif  // VM_RAW_OBJECT_H_