Add --no-background-compilation to tests that expect to run code in optimized form

tests/lib/math/min_max_test.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.
 // Dart test for testing Math.min and Math.max.
-// VMOptions=--optimization-counter-threshold=10
+// VMOptions=--optimization-counter-threshold=10 --no-background-compilation
 
 library min_max_test;
 import "package:expect/expect.dart";
 import 'dart:math';
 
 var inf = double.INFINITY;
 var nan = double.NAN;
 
 // A class that might work if [min] and [max] worked for non-numbers.
 class Wrap implements Comparable {
@@ skipping 555 matching lines @@
   Expect.throws(() => min(wrap1, 0));
   Expect.throws(() => min(0, wrap2));
 }
 
 main() {
   testMin();
   testMin();
   testMax();
   testMax();
 }