Remane io_stream_consumer.dart to io_sink and move out all implementation from IOSink to _IOSinkImp…

tests/standalone/io/http_parser_test.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.
 
 import 'dart:async';
 import 'dart:math';
 import 'dart:scalarlist';
 import 'dart:isolate';
 import 'dart:uri';
 
-part '../../../sdk/lib/io/io_stream_consumer.dart';
+part '../../../sdk/lib/io/io_sink.dart';
 part '../../../sdk/lib/io/http.dart';
 part '../../../sdk/lib/io/http_impl.dart';
 part '../../../sdk/lib/io/http_headers.dart';
 part '../../../sdk/lib/io/http_parser.dart';
 part '../../../sdk/lib/io/socket.dart';
 
 class HttpParserTest {
   static void runAllTests() {
     testParseRequest();
     testParseResponse();
@@ skipping 852 matching lines @@
 0123456789012345678901234567890\r
 0\r\n\r\n""";
     _testParseInvalidResponse(response);
   }
 }
 
 
 void main() {
   HttpParserTest.runAllTests();
 }