Add indexOf to Int/Float-List's.

tests/standalone/byte_array_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.
 //
 // Dart test program for testing native byte arrays.
 
 void testCreateByteArray() {
   Uint8List byteArray;
 
   byteArray = new Uint8List(0);
@@ skipping 35 matching lines @@
 
   Expect.throws(() {
     byteArray.setRange(0, 4, list);
   });
 
   Expect.throws(() {
     byteArray.setRange(3, 1, list);
   });
 }
 
+void testIndexOf() {
+  var list = new Uint8List(10);
+  for (int i = 0; i < list.length; i++) {
+    list[i] = i + 10;
+  }
+  Expect.equals(0, list.indexOf(10));
+  Expect.equals(5, list.indexOf(15));
+  Expect.equals(9, list.indexOf(19));
+  Expect.equals(-1, list.indexOf(20));
+
+  list = new Float32List(10);
+  for (int i = 0; i < list.length; i++) {
+    list[i] = i + 10.0;
+  }
+  Expect.equals(0, list.indexOf(10.0));
+  Expect.equals(5, list.indexOf(15.0));
+  Expect.equals(9, list.indexOf(19.0));
+  Expect.equals(-1, list.indexOf(20.0));
+}
+
 main() {
   for (int i = 0; i < 2000; i++) {
     testCreateByteArray();
     testSetRange();
     testIndexOutOfRange();
+    testIndexOf();
   }
 }