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

tests/language/try_catch_optimized3_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.
-// VMOptions=--optimization-counter-threshold=10
+// VMOptions=--optimization-counter-threshold=10 --no-background-compilation
 
 import "package:expect/expect.dart";
 
 // Test unboxed double operations inside try-catch.
 foo(bool b) {
   if (b) throw 123;
 }
 
 test_double(double x, bool b) {
   try {
     x += 1.0;
     foo(b);
   } catch (e) {
     var result = x - 1.0;
     Expect.equals(1.0, result);
     return result;
   }
 }
 
 main() {
   for (var i = 0; i < 100; i++) test_double(1.0, false);
   test_double(1.0, false);
   Expect.equals(1.0, test_double(1.0, true));
 }