Move frog/tests/{leg,leg_only,frog_native} to tests/compiler/.

frog/tests/leg_only/loop_if_phi_test.dart

Index: frog/tests/leg_only/loop_if_phi_test.dart
===================================================================
--- frog/tests/leg_only/loop_if_phi_test.dart	(revision 8644)
+++ frog/tests/leg_only/loop_if_phi_test.dart	(working copy)
@@ -1,13 +0,0 @@
-// Copyright (c) 2011, 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.
-
-void main() {
-  var prev = -1;
-  for (int i = 0; i < 2; i++) {
-    if (prev != -1) {
-      Expect.equals(0, prev);
-    }
-    prev = i;
-  }
-}