Language tests updated to use const instead of final.

tests/language/compile_time_constant_e_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.
 
 class A {
   final x;
   final y;
   final z;
   final t;
 
   const A([this.z = 99, tt = 100]) : y = 499, t = tt, x = 3;
   const A.named([z, this.t]) : y = 400 + z, this.z = z, x = 3;
   const A.named2([t, z, y, x]) : x = t, y = z, z = y, t = x;
 
   toString() => "A $x $y $z $t";
 }
 
-final a1 = const A(99, 100);
-final a2 = const A.named(99, 100);
-final a3 = const A.named2(1, 2, 3, 4);
-final a4 = const A();
-final a5 = const A(tt: 100, z: 99);
-final a6 = const A(1, tt: 2);
-final a7 = const A.named(z: 7);
-final a8 = const A.named2();
-final a9 = const A.named2(x: 4, y: 3, z: 2, t: 1);
-final a10 = const A.named2(x: 1, y: 2, z: 3, t: 4);
+const a1 = const A(99, 100);
+const a2 = const A.named(99, 100);
+const a3 = const A.named2(1, 2, 3, 4);
+const a4 = const A();
+const a5 = const A(tt: 100, z: 99);
+const a6 = const A(1, tt: 2);
+const a7 = const A.named(z: 7);
+const a8 = const A.named2();
+const a9 = const A.named2(x: 4, y: 3, z: 2, t: 1);
+const a10 = const A.named2(x: 1, y: 2, z: 3, t: 4);
 
 main() {
   Expect.equals(3, a1.x);
   Expect.equals(499, a1.y);
   Expect.equals(99, a1.z);
   Expect.equals(100, a1.t);
   Expect.equals("A 3 499 99 100", a1.toString());
   Expect.isTrue(a1 === a2);
   Expect.isTrue(a1 === a4);
   Expect.isTrue(a1 === a5);
@@ skipping 23 matching lines @@
   Expect.equals("A null null null null", a8.toString());
 
   Expect.isTrue(a3 === a9);
 
   Expect.equals(4, a10.x);
   Expect.equals(3, a10.y);
   Expect.equals(2, a10.z);
   Expect.equals(1, a10.t);
   Expect.equals("A 4 3 2 1", a10.toString());
 }