Language tests updated to use const instead of final.

tests/language/static_field_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.
 // Dart test program for testing setting/getting/initializing static fields.
 
 class First {
   First() {}
   static var a;
   static var b;
-  static final int c = 1;
+  static const int c = 1;
   static setValues() {
     a = 24;
     b = 10;
     return a + b + c;
   }
 }
 
 
 class InitializerTest {
   static var one;
@@ skipping 40 matching lines @@
   }
 }
 
 
 class StaticField1RunNegativeTest {
   static  /// 01: static type warning, runtime error
     var x;
   testMain() {
     var foo = new StaticField1RunNegativeTest();
     print(x); // Used to compile 'x' and force any errors.
-    var result = foo.x; 
+    var result = foo.x;
   }
 }
 
 class StaticField1aRunNegativeTest {
   static  /// 02: static type warning, runtime error
     void m() {}
 
   testMain() {
     var foo = new StaticField1aRunNegativeTest();
     print(m); // Used to compile 'm' and force any errors.
     var result = foo.m;
   }
 }
 
 class StaticField2RunNegativeTest {
   static /// 03:  static type warning, runtime error
     var x;
 
   testMain() {
     var foo = new StaticField2RunNegativeTest();
     print(x); // Used to compile 'x' and force any errors.
     foo.x = 1;
   }
 }
 
 class StaticField2aRunNegativeTest {
   static   /// 04: static type warning, runtime error
-    void m() {} 
+    void m() {}
 
   testMain() {
     var foo = new StaticField2aRunNegativeTest();
     print(m); // Used to compile 'm' and force any errors.
     foo.m = 1; /// 04:continued
   }
 }
 
 main() {
   StaticFieldTest.testMain();
   InitializerTest.testStaticFieldInitialization();
   new StaticField1RunNegativeTest().testMain();
   new StaticField1aRunNegativeTest().testMain();
   new StaticField2RunNegativeTest().testMain();
   new StaticField2aRunNegativeTest().testMain();
 }