Load the native call wrapper via Thread.

runtime/vm/thread.cc

 // Copyright (c) 2015, 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.
 
 #include "vm/thread.h"
 
 #include "vm/growable_array.h"
 #include "vm/isolate.h"
 #include "vm/lockers.h"
 #include "vm/log.h"
+#include "vm/native_entry.h"
 #include "vm/object.h"
 #include "vm/os_thread.h"
 #include "vm/profiler.h"
 #include "vm/runtime_entry.h"
 #include "vm/stub_code.h"
 #include "vm/symbols.h"
 #include "vm/thread_interrupter.h"
 #include "vm/thread_registry.h"
 
 namespace dart {
@@ skipping 362 matching lines @@
     return Thread::name##_entry_point_offset();                                \
   }
 LEAF_RUNTIME_ENTRY_LIST(COMPUTE_OFFSET)
 #undef COMPUTE_OFFSET
 
   UNREACHABLE();
   return -1;
 }
 
 }  // namespace dart