Added support for isolate unhandled exceptions.

runtime/vm/bootstrap_natives.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_BOOTSTRAP_NATIVES_H_
 #define VM_BOOTSTRAP_NATIVES_H_
 
 #include "vm/native_entry.h"
 
 // bootstrap dart natives used in the core dart library.
@@ skipping 158 matching lines @@
   V(ExternalUint32Array_setIndexed, 3)                                         \
   V(ExternalInt64Array_getIndexed, 2)                                          \
   V(ExternalInt64Array_setIndexed, 3)                                          \
   V(ExternalUint64Array_getIndexed, 2)                                         \
   V(ExternalUint64Array_setIndexed, 3)                                         \
   V(ExternalFloat32Array_getIndexed, 2)                                        \
   V(ExternalFloat32Array_setIndexed, 3)                                        \
   V(ExternalFloat64Array_getIndexed, 2)                                        \
   V(ExternalFloat64Array_setIndexed, 3)                                        \
   V(isolate_getPortInternal, 0)                                                \
-  V(isolate_spawnFunction, 1)                                                  \
-  V(isolate_spawnUri, 1)                                                       \
+  V(isolate_spawnFunction, 2)                                                  \
+  V(isolate_spawnUri, 2)                                                       \
   V(Mirrors_isLocalPort, 1)                                                    \
   V(Mirrors_makeLocalInstanceMirror, 1)                                        \
   V(Mirrors_makeLocalMirrorSystem, 0)                                          \
   V(LocalObjectMirrorImpl_invoke, 3)                                           \
   V(LocalObjectMirrorImpl_getField, 2)                                         \
   V(LocalObjectMirrorImpl_setField, 3)                                         \
   V(LocalClosureMirrorImpl_apply, 2)                                           \
   V(LocalClassMirrorImpl_invokeConstructor, 3)                                 \
   V(GrowableObjectArray_allocate, 2)                                           \
   V(GrowableObjectArray_getIndexed, 2)                                         \
@@ skipping 15 matching lines @@
   static void DN_##name(Dart_NativeArguments args);
 
   BOOTSTRAP_NATIVE_LIST(DECLARE_BOOTSTRAP_NATIVE)
 
 #undef DECLARE_BOOTSTRAP_NATIVE
 };
 
 }  // namespace dart
 
 #endif  // VM_BOOTSTRAP_NATIVES_H_