| Index: runtime/lib/profiler.dart
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| diff --git a/runtime/lib/profiler.dart b/runtime/lib/profiler.dart
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| index b60760a4c0176d546eecc11ff2b4dc37085c8faa..2a085c2438dbec7f6c991ee84e1043e12c1b1d20 100644
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| --- a/runtime/lib/profiler.dart
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| +++ b/runtime/lib/profiler.dart
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| @@ -2,6 +2,8 @@
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|  // for details. All rights reserved. Use of this source code is governed by a
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|  // BSD-style license that can be found in the LICENSE file.
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|  
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| +import 'dart:_internal';
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| +
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|  @patch class UserTag {
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|    @patch factory UserTag(String label) {
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|      return new _UserTag(label);
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| 
 |