Fix void foo(..) => ... to use { } instead.

sdk/lib/io/http_session.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of dart.io;
 
 const String _DART_SESSION_ID = "DARTSESSID";
 
 // A _HttpSession is a node in a double-linked list, with _next and _prev being
 // the previous and next pointers.
@@ skipping 35 matching lines @@
   }
 
   // Map implementation:
   bool containsValue(value) => _data.containsValue(value);
   bool containsKey(key) => _data.containsKey(key);
   operator [](key) => _data[key];
   void operator []=(key, value) { _data[key] = value; }
   putIfAbsent(key, ifAbsent) => _data.putIfAbsent(key, ifAbsent);
   addAll(Map other) => _data.addAll(other);
   remove(key) => _data.remove(key);
-  void clear() => _data.clear();
-  void forEach(void f(key, value)) => _data.forEach(f);
+  void clear() { _data.clear(); }
+  void forEach(void f(key, value)) { _data.forEach(f); }
   Iterable get keys => _data.keys;
   Iterable get values => _data.values;
   int get length => _data.length;
   bool get isEmpty => _data.isEmpty;
   bool get isNotEmpty => _data.isNotEmpty;
 
   String toString() => 'HttpSession id:$id $_data';
 }
 
 // Private class used to manage all the active sessions. The sessions are stored
@@ skipping 29 matching lines @@
     _addToTimeoutQueue(session);
     return session;
   }
 
   void set sessionTimeout(int timeout) {
     _sessionTimeout = timeout;
     _stopTimer();
     _startTimer();
   }
 
-  void close() => _stopTimer();
+  void close() { _stopTimer(); }
 
   void _bumpToEnd(_HttpSession session) {
     _removeFromTimeoutQueue(session);
     _addToTimeoutQueue(session);
   }
 
   void _addToTimeoutQueue(_HttpSession session) {
     if (_head == null) {
       assert(_tail == null);
       _tail = _head = session;
@@ skipping 47 matching lines @@
   }
 
   void _stopTimer() {
     if (_timer != null) {
       _timer.cancel();
       _timer = null;
     }
   }
 }