Fix non-Windows builds

runtime/bin/run_vm_tests.cc

 // 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.
 
 #include <stdio.h>
 
 #include "bin/file.h"
 #include "bin/dartutils.h"
 #include "bin/platform.h"
 
@@ skipping 107 matching lines @@
   // Apply the filter to all registered tests.
   TestCaseBase::RunAll();
   // Apply the filter to all registered benchmarks.
   Benchmark::RunAll(argv[0]);
 
   if (Flags::IsSet("shutdown")) {
     err_msg = Dart::Cleanup();
     ASSERT(err_msg == NULL);
   }
 
+#if defined(TARGET_OS_WINDOWS)
   // TODO(zra): Remove once VM shuts down cleanly.
   private_flag_windows_run_tls_destructors = false;
+#endif
 
   // Print a warning message if no tests or benchmarks were matched.
   if (run_matches == 0) {
     fprintf(stderr, "No tests matched: %s\n", run_filter);
     return 1;
   }
   return 0;
 }
 
 }  // namespace dart
 
 
 int main(int argc, const char** argv) {
   return dart::Main(argc, argv);
 }