More tests updated to optimize code (Part 2).

tests/language/inline_add_constants_to_initial_env_test.dart

Index: tests/language/inline_add_constants_to_initial_env_test.dart
===================================================================
--- tests/language/inline_add_constants_to_initial_env_test.dart	(revision 24922)
+++ tests/language/inline_add_constants_to_initial_env_test.dart	(working copy)
@@ -3,6 +3,7 @@
 // BSD-style license that can be found in the LICENSE file.
 // Test that SSA values are correctly numbered after inlining that adds
 // constants to original environment.
+// VMOptions=--optimization-counter-threshold=10
 
 h(x, y) => x == y;
 
@@ -11,5 +12,5 @@
 f(y) => h(y, g(y));
 
 main() {
-  for (var i = 0; i < 1000; i++) f(i);
+  for (var i = 0; i < 20; i++) f(i);
 }