Make StreamSubscription be the active part of a stream.

sdk/lib/io/http_parser.dart

Index: sdk/lib/io/http_parser.dart
diff --git a/sdk/lib/io/http_parser.dart b/sdk/lib/io/http_parser.dart
index 58622cf3e068a850254033cbce123ca8ac428b36..b9123bd0afd67aae9b89297f4deb2583c0c75989 100644
--- a/sdk/lib/io/http_parser.dart
+++ b/sdk/lib/io/http_parser.dart
@@ -928,14 +928,6 @@ class _HttpParser
   }
 
   void _pauseStateChanged() {
-    void update(bool pause) {
-      if (pause && !_socketSubscription.isPaused) {
-        _socketSubscription.pause();
-      } else if (!pause && _socketSubscription.isPaused) {
-        _socketSubscription.resume();
-      }
-    }
-
     if (_incoming != null) {
       if (!_bodyPaused && !_parserCalled) {
         _parse();