Change getRange to sublist. Make getRange deprecated.

tests/corelib/string_codeunits_test.dart

 // Copyright (c) 2011, 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.
 
 main() {
   test(String s) {
     Iterable<int> units = s.codeUnits;
     List<int> expectedUnits = <int>[];
     for (int i = 0; i < s.length; i++) {
       expectedUnits.add(s.codeUnitAt(i));
@@ skipping 13 matching lines @@
 
     // .map
     Expect.listEquals(expectedUnits.map((x) => x.toRadixString(16)).toList(),
                       units.map((x) => x.toRadixString(16)).toList());
 
     if (s == "") {
       Expect.throws(() => units.first, (e) => e is StateError);
       Expect.throws(() => units.last, (e) => e is StateError);
       Expect.throws(() => units[0], (e) => e is RangeError);
       Expect.throws(() => units[0] = 499, (e) => e is UnsupportedError);
-      Expect.listEquals([], units.getRange(0, 0));
+      Expect.listEquals([], units.sublist(0, 0));
       Expect.equals(-1, units.indexOf(42));
       Expect.equals(-1, units.lastIndexOf(499));
     } else {
       Expect.equals(s.codeUnitAt(0), units.first);
       Expect.equals(s.codeUnitAt(s.length - 1), units.last);
       Expect.equals(s.codeUnitAt(0), units[0]);
       Expect.throws(() { units[0] = 499; }, (e) => e is UnsupportedError);
-      List<int> sub = units.getRange(1, units.length - 1);
+      List<int> sub = units.sublist(1);
       Expect.listEquals(s.substring(1, s.length).codeUnits, sub);
       Expect.equals(-1, units.indexOf(-1));
       Expect.equals(0, units.indexOf(units[0]));
       Expect.equals(-1, units.lastIndexOf(-1));
       Expect.equals(units.length - 1, units.lastIndexOf(units[units.length - 1]));
     }
 
     Iterable reversed = units.reversed;
     int i = units.length - 1;
     for (int codeUnit in reversed) {
@@ skipping 13 matching lines @@
   test(string);
 
   // Reading each unit of a surrogate pair works.
   var r = "\u{10000}".codeUnits;
   var it = r.iterator;
   Expect.isTrue(it.moveNext());
   Expect.equals(0xD800, it.current);
   Expect.isTrue(it.moveNext());
   Expect.equals(0xDC00, it.current);
 }