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

tests/standalone/pair_location_remapping_test.dart

 // Copyright (c) 2014, 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.
 // Test that pair locations are remaped in slow path environments.
-// VMOptions=--optimization_counter_threshold=10 --no-use-osr
+// VMOptions=--optimization_counter_threshold=10 --no-use-osr --no-background_compilation
 
 import "package:expect/expect.dart";
 
 class A {
   final f;
   A(this.f);
 }
 
 foo(i) {
   var j = 0x7fffffffffffffff + i;
   var c = new A(j);  // allocation will be sunk
   var r = 0;
   for (var k = 0; k < 10; k++) {
     if ((j & (1 << k)) != 0) {
       r++;
     }
   }
   return c.f - r;
 }
 
 main() {
   for (var i = 0; i < 1000; i++) {
     Expect.equals(0x7fffffffffffffff - 10, foo(0));
   }
 }