Code cleanup (mostly io lib and some http lib).

sdk/lib/io/io_sink.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;
 
 /**
  * Helper class to wrap a [StreamConsumer<List<int>>] and provide
  * utility functions for writing to the StreamConsumer directly. The
  * [IOSink] buffers the input given by all [StringSink] methods and will delay
@@ skipping 60 matching lines @@
 class _StreamSinkImpl<T> implements StreamSink<T> {
   final StreamConsumer<T> _target;
   Completer _doneCompleter = new Completer();
   Future _doneFuture;
   StreamController<T> _controllerInstance;
   Completer _controllerCompleter;
   bool _isClosed = false;
   bool _isBound = false;
   bool _hasError = false;
 
-  _StreamSinkImpl(StreamConsumer<T> this._target) {
+  _StreamSinkImpl(this._target) {
     _doneFuture = _doneCompleter.future;
   }
 
   void add(T data) {
     if (_isClosed) return;
     _controller.add(data);
   }
 
-  void addError(error, [StackTrace stackTrace]) {
-    _controller.addError(error, stackTrace);
-  }
+  void addError(error, [StackTrace stackTrace]) =>
+      _controller.addError(error, stackTrace);
 
   Future addStream(Stream<T> stream) {
     if (_isBound) {
       throw new StateError("StreamSink is already bound to a stream");
     }
     _isBound = true;
     if (_hasError) return done;
     // Wait for any sync operations to complete.
     Future targetAddStream() {
       return _target.addStream(stream)
@@ skipping 140 matching lines @@
 
   void writeln([Object obj = ""]) {
     write(obj);
     write("\n");
   }
 
   void writeCharCode(int charCode) {
     write(new String.fromCharCode(charCode));
   }
 }