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

tests/language/guess_cid_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.
 // Dart test program to test cid guessing optimizations.
-// VMOptions=--optimization-counter-threshold=10
+// VMOptions=--optimization-counter-threshold=10 --no-background-compilation
 
 import "package:expect/expect.dart";
 
 main() {
   // Warmup optimizes methods.
   for (int i = 0; i < 100; i++) {
     Expect.equals(i, compareInt(i));
     Expect.equals(i.toDouble(), compareDouble(i.toDouble()));
     Expect.equals(i, binOpInt(i, i));
     Expect.equals(i.toDouble(), binOpDouble(i.toDouble(), i.toDouble()));
   }
   Expect.equals(3, compareInt(3));
   Expect.equals(-2, compareInt(-2));
   Expect.equals(0, compareInt(-1));
-  
+
   Expect.equals(3, binOpInt(3, 3));
   Expect.equals(0, binOpInt(-2, -2));
-  
+
   Expect.equals(3.0, binOpDouble(3.0, 3.0));
   Expect.equals(0.0, binOpDouble(-2.0, -2.0));
-  
+
   Expect.equals(3.0, compareDouble(3.0));
   Expect.equals(-2.0, compareDouble(-2.0));
   Expect.equals(0.0, compareDouble(-1.0));
-  
+
   testOSR();
 }
 
 int compareInt(int i) {
   if (i < 0) {
     // Not visited in before optimization.
     // Guess cid of comparison below.
     if (i == -1) return 0;
   }
   return i;
@@ skipping 38 matching lines @@
   for (int i = 0; i < N; ++i) {
     // Will trigger OSR. Operation in loop below will use guessed cids.
   }
   int sum = 0;
   for (int i = 0; i < N; ++i) {
     // Guess 'x' is Smi, but is actually Bigint: deoptimize.
     sum += x + 2;
   }
   return sum;
 }