Address Siva's review comment

tests/language/throw_expr_test.dart

Index: tests/language/throw_expr_test.dart
===================================================================
--- tests/language/throw_expr_test.dart	(revision 12929)
+++ tests/language/throw_expr_test.dart	(working copy)
@@ -50,9 +50,9 @@
 
 void test3() {
   try {
-    throw throw throw "throw";
+    throw throw throw "up";
   } catch(e) {
-    Expect.equals("throw", e);
+    Expect.equals("up", e);
   }
 
   var x = 10;