| Index: pkg/dev_compiler/tool/input_sdk/patch/mirrors_patch.dart | 
| diff --git a/pkg/dev_compiler/tool/input_sdk/patch/mirrors_patch.dart b/pkg/dev_compiler/tool/input_sdk/patch/mirrors_patch.dart | 
| index 758b1647a6b7893e56999662b6539089c7431597..eb6319c591d9f7d977ba472d608697c325b30708 100644 | 
| --- a/pkg/dev_compiler/tool/input_sdk/patch/mirrors_patch.dart | 
| +++ b/pkg/dev_compiler/tool/input_sdk/patch/mirrors_patch.dart | 
| @@ -10,6 +10,12 @@ import 'dart:_js_mirrors' as js; | 
| @patch | 
| class MirrorSystem { | 
| @patch | 
| +  LibraryMirror findLibrary(Symbol libraryName) { | 
| +    return libraries.values.singleWhere( | 
| +        (library) => library.simpleName == libraryName); | 
| +  } | 
| + | 
| +  @patch | 
| static String getName(Symbol symbol) => js.getName(symbol); | 
|  | 
| @patch | 
|  |