test rename overhaul: step 5 - frog and leg tests

frog/tests/leg/src/GenerateAtUseSiteTest.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.
-
-#import("compiler_helper.dart");
-
-final String FIB = @"""
-fib(n) {
-  if (n <= 1) return 1;
-  return fib(n - 1) + fib(n - 2);
-}
-""";
-
-main() {
-  // Make sure we don't introduce a new variable.
-  RegExp regexp = new RegExp("var $anyIdentifier =");
-  compileAndDoNotMatch(FIB, 'fib', regexp);
-}