Introduce class Sink<T>.

sdk/lib/io/data_transformer.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;
 
 /**
  * Exposes ZLib options for input parameters.
  *
  * See http://www.zlib.net/manual.html for more documentation.
@@ skipping 344 matching lines @@
    * constructor.
    */
   List<int> convert(List<int> bytes) {
     _BufferSink sink = new _BufferSink();
     startChunkedConversion(sink)..add(bytes)..close();
     return sink.builder.takeBytes();
   }
 
   /**
    * Start a chunked conversion using the options given to the [ZLibEncoder]
-   * constructor. While it accepts any [ChunkedConversionSink] taking
-   * [List<int>]'s, the optimal sink to be passed as [sink] is a
-   * [ByteConversionSink].
+   * constructor. While it accepts any [Sink] taking [List<int>]'s,
+   * the optimal sink to be passed as [sink] is a [ByteConversionSink].
    */
-  ByteConversionSink startChunkedConversion(
-      ChunkedConversionSink<List<int>> sink) {
+  ByteConversionSink startChunkedConversion(Sink<List<int>> sink) {
     if (sink is! ByteConversionSink) {
       sink = new ByteConversionSink.from(sink);
     }
-
     return new _ZLibEncoderSink(sink, gzip, level, windowBits, memLevel,
                                 strategy, dictionary, raw);
   }
 }
 
 
 /**
  * The [ZLibDecoder] is used by [ZLibCodec] and [GZipCodec] to decompress data.
  */
 class ZLibDecoder extends Converter<List<int>, List<int>> {
@@ skipping 31 matching lines @@
    * Convert a list of bytes using the options given to the [ZLibDecoder]
    * constructor.
    */
   List<int> convert(List<int> bytes) {
     _BufferSink sink = new _BufferSink();
     startChunkedConversion(sink)..add(bytes)..close();
     return sink.builder.takeBytes();
   }
 
   /**
-   * Start a chunked conversion. While it accepts any [ChunkedConversionSink]
+   * Start a chunked conversion. While it accepts any [Sink]
    * taking [List<int>]'s, the optimal sink to be passed as [sink] is a
    * [ByteConversionSink].
    */
-  ByteConversionSink startChunkedConversion(
-      ChunkedConversionSink<List<int>> sink) {
+  ByteConversionSink startChunkedConversion(Sink<List<int>> sink) {
     if (sink is! ByteConversionSink) {
       sink = new ByteConversionSink.from(sink);
     }
     return new _ZLibDecoderSink(sink, windowBits, dictionary, raw);
   }
 }
 
 
 class _BufferSink extends ByteConversionSink {
   final BytesBuilder builder = new BytesBuilder();
@@ skipping 148 matching lines @@
 }
 
 void _validateZLibStrategy(int strategy) {
   const strategies = const <int>[ZLibOption.STRATEGY_FILTERED,
       ZLibOption.STRATEGY_HUFFMAN_ONLY, ZLibOption.STRATEGY_RLE,
       ZLibOption.STRATEGY_FIXED, ZLibOption.STRATEGY_DEFAULT];
   if (strategies.indexOf(strategy) == -1) {
     throw new ArgumentError("Unsupported 'strategy'");
   }
 }