Fix for Issue 2399.

client/tests/client/dom/TypedArrays4Test.dart

+// Copyright (c) 2012, 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.
+
+#library('TypedArrays4Test');
+#import('../../../../lib/unittest/unittest_dom.dart');
+#import('dart:dom');
+
+main() {
+
+  forLayoutTests();
+
+  test('indexOf_dynamic', () {
+      var a1 = new Uint8Array(1024);
+      for (int i = 0; i < a1.length; i++) {
+        a1[i] = i;
+      }
+
+      Expect.equals(50, a1.indexOf(50));
+      Expect.equals(50, a1.indexOf(50, 50));
+      Expect.equals(256 + 50, a1.indexOf(50, 51));
+
+      Expect.equals(768 + 50, a1.lastIndexOf(50));
+      Expect.equals(768 + 50, a1.lastIndexOf(50, 768 + 50));
+      Expect.equals(512 + 50, a1.lastIndexOf(50, 768 + 50 - 1));
+  });
+
+  test('indexOf_typed', () {
+      Uint8Array a1 = new Uint8Array(1024);
+      for (int i = 0; i < a1.length; i++) {
+        a1[i] = i;
+      }
+
+      Expect.equals(50, a1.indexOf(50));
+      Expect.equals(50, a1.indexOf(50, 50));
+      Expect.equals(256 + 50, a1.indexOf(50, 51));
+
+      Expect.equals(768 + 50, a1.lastIndexOf(50));
+      Expect.equals(768 + 50, a1.lastIndexOf(50, 768 + 50));
+      Expect.equals(512 + 50, a1.lastIndexOf(50, 768 + 50 - 1));
+  });
+}