Change getRange to sublist. Make getRange deprecated.

tests/standalone/io/zlib_test.dart

Index: tests/standalone/io/zlib_test.dart
diff --git a/tests/standalone/io/zlib_test.dart b/tests/standalone/io/zlib_test.dart
index dcae4ffa80a34fdd1ad1371ac2001e71c695169b..87626f11f71873ca204068eb01efc765749e3d66 100644
--- a/tests/standalone/io/zlib_test.dart
+++ b/tests/standalone/io/zlib_test.dart
@@ -79,7 +79,7 @@ void testZLibDeflateGZip() {
         Expect.listEquals([98, 96, 100, 98, 102, 97, 101, 99, 231, 224, 4, 0, 0,
                            0, 255, 255],
                           // Skip header, as it can change.
-                          data.getRange(10, 16));
+                          data.sublist(10));
         port.close();
       });
   controller.add(data);