| Index: sdk/lib/io/websocket_impl.dart
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| diff --git a/sdk/lib/io/websocket_impl.dart b/sdk/lib/io/websocket_impl.dart
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| index db69f44d01e11acf4026ac00eeee06c648c447d4..c7d9e10ef7137540195bac5a0ae399ef9da69ff7 100644
 | 
| --- a/sdk/lib/io/websocket_impl.dart
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| +++ b/sdk/lib/io/websocket_impl.dart
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| @@ -385,7 +385,7 @@ class _WebSocketTransformerImpl implements WebSocketTransformer {
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|          response.contentLength = 0;
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|          response.close();
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|        });
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| -      return new Future.immediateError(
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| +      return new Future.error(
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|            new WebSocketException("Invalid WebSocket upgrade request"));
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|      }
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|  
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| 
 |