Fix HttpRequest example.

sdk/lib/io/http.dart

Index: sdk/lib/io/http.dart
diff --git a/sdk/lib/io/http.dart b/sdk/lib/io/http.dart
index 18360c64d6d85e50a2fb5f5f4dbeefd54a2c4de3..371543fa505218bff53794166aa9ea4a4292729d 100644
--- a/sdk/lib/io/http.dart
+++ b/sdk/lib/io/http.dart
@@ -877,14 +877,8 @@ abstract class Cookie {
  *
  *     void handleGetRequest(HttpRequest req) {
  *       HttpResponse res = req.response;
- *       var body = [];
- *       req.listen((List<int> buffer) => body.add(buffer),
- *         onDone: () {
- *           res.write('Received ${body.length} for request ');
- *           res.write(' ${req.method}: ${req.uri.path}');
- *           res.close();
- *         },
- *         onError: handleError);
+ *       res.write('Received request ${req.method}: ${req.uri.path}');
+ *       res.close();
  *     }
  */
 abstract class HttpRequest implements Stream<List<int>> {