Language tests updated to use const instead of final.

tests/language/compile_time_constant2_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.
 
-final x = 19;
-final y = 3;
-final g1 = x + y;
-final g2 = x * y;
-final g3 = x / y;
-final g4 = x ~/ y;
-final g5 = x << y;
-final g6 = x >> y;
-final g7 = ~x;
-final g8 = -x;
-final g9 = x < y;
-final g10 = x <= y;
-final g11 = x <= x;
-final g12 = x > y;
-final g13 = x >= y;
-final g14 = x >= x;
-final g15 = x == y;
-final g16 = x == x;
-final g17 = x != y;
-final g18 = x != x;
-final g19 = x | y;
-final g20 = x & y;
-final g21 = x ^ y;
-final g22 = g1 + g2 + g4 + g5 + g6 + g7 + g8;
-final g23 = x % y;
+const x = 19;
+const y = 3;
+const g1 = x + y;
+const g2 = x * y;
+const g3 = x / y;
+const g4 = x ~/ y;
+const g5 = x << y;
+const g6 = x >> y;
+const g7 = ~x;
+const g8 = -x;
+const g9 = x < y;
+const g10 = x <= y;
+const g11 = x <= x;
+const g12 = x > y;
+const g13 = x >= y;
+const g14 = x >= x;
+const g15 = x == y;
+const g16 = x == x;
+const g17 = x != y;
+const g18 = x != x;
+const g19 = x | y;
+const g20 = x & y;
+const g21 = x ^ y;
+const g22 = g1 + g2 + g4 + g5 + g6 + g7 + g8;
+const g23 = x % y;
 
 main() {
   Expect.equals(22, g1);
   Expect.equals(57, g2);
   Expect.equals(6.333333333333333333333333333, g3);
   Expect.equals(6, g4);
   Expect.equals(152, g5);
   Expect.equals(2, g6);
   Expect.equals(-20, g7);
   Expect.equals(-19, g8);
   Expect.equals(false, g9);
   Expect.equals(false, g10);
   Expect.equals(true, g11);
   Expect.equals(true, g12);
   Expect.equals(true, g13);
   Expect.equals(true, g14);
   Expect.equals(false, g15);
   Expect.equals(true, g16);
   Expect.equals(true, g17);
   Expect.equals(false, g18);
   Expect.equals(19, g19);
   Expect.equals(3, g20);
   Expect.equals(16, g21);
   Expect.equals(200, g22);
   Expect.equals(1, g23);
 }