Fix static warnings introduced by library cleanup.

sdk/lib/io/secure_server_socket.dart

Index: sdk/lib/io/secure_server_socket.dart
diff --git a/sdk/lib/io/secure_server_socket.dart b/sdk/lib/io/secure_server_socket.dart
index 0d645d26c197468d2e3fb6d4bc9dfecd40e4a695..7f928b15e35d20ce96087b211a39cae3fe554a3d 100644
--- a/sdk/lib/io/secure_server_socket.dart
+++ b/sdk/lib/io/secure_server_socket.dart
@@ -253,10 +253,13 @@ class RawSecureServerSocket extends Stream<RawSecureSocket> {
     });
   }
 
-  void _onError(e, [StackTrace stackTrace]) =>
-      _controller.addError(e, stackTrace);
+  void _onError(e, [StackTrace stackTrace]) {
+    _controller.addError(e, stackTrace);
+  }
 
-  void _onDone() => _controller.close();
+  void _onDone() {
+    _controller.close();
+  }
 
   void _onPauseStateChange() {
     if (_controller.isPaused) {