More tests updated to optimize code (Part 2).

tests/language/if_conversion_vm_test.dart

Index: tests/language/if_conversion_vm_test.dart
===================================================================
--- tests/language/if_conversion_vm_test.dart	(revision 24922)
+++ tests/language/if_conversion_vm_test.dart	(working copy)
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // Test if-convertion pass in the optimizing compiler.
+// VMOptions=--optimization-counter-threshold=10 --no-use-osr
 
 import "package:expect/expect.dart";
 
@@ -40,7 +41,7 @@
 f18(b) => b ? 2 : 0;
 
 main() {
-  for (var i = 0; i < 10000; i++) {
+  for (var i = 0; i < 20; i++) {
     f1(i);
     f2(i);
     f3(i);
@@ -110,4 +111,4 @@
 
   Expect.equals(0, f18(false));
   Expect.equals(2, f18(true));
-}
+}