| Index: tests/compiler/dart2js/mock_compiler.dart
 | 
| diff --git a/tests/compiler/dart2js/mock_compiler.dart b/tests/compiler/dart2js/mock_compiler.dart
 | 
| index 2a9a39fa6a0eb86fed6b6c4ba61bb75c2560a63c..e18571237b25d173f382e98c65da5bb3e445af30 100644
 | 
| --- a/tests/compiler/dart2js/mock_compiler.dart
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| +++ b/tests/compiler/dart2js/mock_compiler.dart
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| @@ -134,6 +134,8 @@ class MockCompiler extends Compiler {
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|      }
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|      registerSource(Uris.dart_async,
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|                     buildLibrarySource(asyncLibrarySource));
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| +    registerSource(JavaScriptBackend.PACKAGE_LOOKUP_MAP,
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| +                   buildLibrarySource(DEFAULT_LOOKUP_MAP_LIBRARY));
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|    }
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|  
 | 
|    String get patchVersion {
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| 
 |