More tests updated to optimize code (Part 2).

tests/language/equality_test.dart

 // Copyright (c) 2012, 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
 
 import "package:expect/expect.dart";
 
 
 class A {
   bool _result;
   A(this._result);
   operator ==(x) { return _result; }
 }
 
@@ skipping 13 matching lines @@
   Expect.isFalse(alwaysFalse == alwaysFalse);
   Expect.isTrue(alwaysFalse != alwaysFalse);
   Expect.isTrue(alwaysTrue == alwaysTrue);
   Expect.isTrue(alwaysTrue == 5);
   Expect.isFalse(alwaysTrue == null);
   Expect.isFalse(null == alwaysTrue);
   Expect.isTrue(alwaysTrue != null);
   Expect.isTrue(null != alwaysTrue);
   Expect.isTrue(null == null);
   Expect.isFalse(null != null);
-  
+
   Expect.throws(() => death() == 5);
   Expect.isFalse(death() == nullFn());
   Expect.isFalse(nullFn() == death());
   Expect.isTrue(nullFn() == nullFn());
   Expect.isTrue(death() != nullFn());
   Expect.isTrue(nullFn() != death());
   Expect.isFalse(nullFn() != nullFn());
 
   if (death() == nullFn()) {
     throw "failed";
   }
   if (death() != nullFn()) {
   } else {
     throw "failed";
   }
 }
 
 main() {
-  for (int i = 0; i < 1000; i++) tests();
+  for (int i = 0; i < 20; i++) tests();
 }