| Index: runtime/lib/async_sources.gypi | 
| diff --git a/runtime/lib/async_sources.gypi b/runtime/lib/async_sources.gypi | 
| index 896e5088c2a6242804a35c1cf72431d03b6f8efa..f1319b96933bbc3f894425356d7d546787cf9d51 100644 | 
| --- a/runtime/lib/async_sources.gypi | 
| +++ b/runtime/lib/async_sources.gypi | 
| @@ -5,6 +5,8 @@ | 
| # This file contains all sources for the dart:async library. | 
| { | 
| 'sources': [ | 
| +    'async_patch.dart', | 
| +    # The above file needs to be first as it imports required libraries. | 
| 'deferred_load_patch.dart', | 
| 'schedule_microtask_patch.dart', | 
| 'timer_patch.dart', | 
|  |