Revert "Remove NullPointerException."

tests/corelib/null_nosuchmethod_test.dart

Index: tests/corelib/null_nosuchmethod_test.dart
diff --git a/tests/corelib/null_nosuchmethod_test.dart b/tests/corelib/null_nosuchmethod_test.dart
index 7ae75401e564768f0159725e48175a6c7b928eb0..2d6514c319cdc9b7e2e5e95fe56c2c5cad1119f5 100644
--- a/tests/corelib/null_nosuchmethod_test.dart
+++ b/tests/corelib/null_nosuchmethod_test.dart
@@ -8,15 +8,15 @@ main() {
   var x;
   // Non-existing method calls noSuchMethod.
   Expect.throws(() => x.foo(),
-                (e) => e is NoSuchMethodError);
+                (e) => e is NullPointerException);
 
   // Calling noSuchMethod directly.
   Expect.throws(() => x.noSuchMethod("foo", []),
-                (e) => e is NoSuchMethodError);
+                (e) => e is NullPointerException);
 
   // Closurizing noSuchMethod and calling it.
   var nsm = x.noSuchMethod;
   Expect.notEquals(null, nsm);
   Expect.throws(() => nsm("foo", []),
-                (e) => e is NoSuchMethodError);
+                (e) => e is NullPointerException);
 }