Change getRange to sublist. Make getRange deprecated.

tests/standalone/io/mime_multipart_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';
 
 part '../../../sdk/lib/io/io_sink.dart';
 part "../../../sdk/lib/io/http.dart";
 part "../../../sdk/lib/io/http_impl.dart";
@@ skipping 50 matching lines @@
     partCount = 0;
     headers = new Map();
     currentPart = null;
     lastPartCalled = false;
   }
 
   void testWrite(List<int> data, [int chunkSize = -1]) {
     if (chunkSize == -1) chunkSize = data.length;
     reset();
     int written = 0;
-    int unparsed;
     for (int pos = 0; pos < data.length; pos += chunkSize) {
       int remaining = data.length - pos;
       int writeLength = min(chunkSize, remaining);
+      int parsed =
+          parser.update(data.sublist(pos, pos + writeLength), 0, writeLength);
+      Expect.equals(writeLength, parsed);
       written += writeLength;
-      int parsed =
-          parser.update(data.getRange(pos, writeLength), 0, writeLength);
-      unparsed = writeLength - parsed;
-      Expect.equals(0, unparsed);
     }
     Expect.isTrue(lastPartCalled);
   }
 
   // Test parsing the data three times delivering the data in
   // different chunks.
   List<int> data = message.codeUnits;
   testWrite(data);
   testWrite(data, 10);
   testWrite(data, 2);
@@ skipping 246 matching lines @@
 \r
 Body2\r
 --xxx\r\n""";
   Expect.throws(() => testParse(message, "xxx", null, [null, null]));
 }
 
 void main() {
   testParseValid();
   testParseInvalid();
 }