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

tests/language/allocation_sinking_inlining_test.dart

 
 // Copyright (c) 2013, 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.
-// VMOptions=--optimization-counter-threshold=10 --no-use-osr
+// VMOptions=--optimization-counter-threshold=10 --no-use-osr --no-background-compilation
 
 // Test allocation sinking with polymorphic inlining.
 
 import "package:expect/expect.dart";
 
 class A {
   foo(x) => ++x.f;
 }
 
 class B {
@@ skipping 11 matching lines @@
 
 main() {
   var a = new A();
   var b = new B();
   Expect.equals(1, test(a));
   Expect.equals(-1, test(b));
   for (var i = 0; i < 20; i++) test(a);
   Expect.equals(1, test(a));
   Expect.equals(-1, test(b));
 }