Add VMOptions to optimize tests that need to be (Part I).

tests/language/bit_operations_test.dart

 // Copyright (c) 2011, 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 for testing bitwise operations.
+// VMOptions=--optimization-counter-threshold=10 --no-use-osr
 
 import "package:expect/expect.dart";
 
 class BitOperationsTest {
   static testMain() {
     for (int i = 0; i < 4; i++) {
       testOne();
     }
   }
   static testOne() {
@@ skipping 34 matching lines @@
     Expect.equals(15, 0xF00000000 >> 32);
     Expect.equals(1030792151040, 16492674416655 >> 4);
 
     Expect.equals(0xF0000000000000000F0, 0xF0000000000000000F << 4);
     Expect.equals(0xF00000000, 15 << 32);
 
     TestNegativeValueShifts();
     TestPositiveValueShifts();
     TestNoMaskingOfShiftCount();
     TestNegativeCountShifts();
-    for (int i = 0; i < 10000; i++) {
+    for (int i = 0; i < 20; i++) {
       TestCornerCasesRightShifts();
       TestRightShift64Bit();
       TestLeftShift64Bit();
       TestLeftShift64BitWithOverflow1();
       TestLeftShift64BitWithOverflow2();
       TestLeftShift64BitWithOverflow3();
     }
   }
 
   static void TestCornerCasesRightShifts() {
@@ skipping 51 matching lines @@
       try {
         var x = a >> b;
         return false;
       } catch (e) {
         return true;
       }
     }
 
     Expect.isTrue(throwOnLeft(12, -3));
     Expect.isTrue(throwOnRight(12, -3));
-    for (int i = 0; i < 4000; i++) {
+    for (int i = 0; i < 20; i++) {
       Expect.isFalse(throwOnLeft(12, 3));
       Expect.isFalse(throwOnRight(12, 3));
     }
   }
 
   static void TestNegativeValueShifts() {
     for (int value = 0; value > -100; value--) {
       for (int i = 0; i < 300; i++) {
         int b = (value << i) >> i;
         Expect.equals(value, b);
@@ skipping 27 matching lines @@
     }
   }
 
   static int ShiftLeft(int a, int b) { return a << b; }
   static int ShiftRight(int a, int b) { return a >> b; }
 }
 
 main() {
   BitOperationsTest.testMain();
 }