Use the USE_NSS macro to help porting to FreeBSD, OpenBSD, etc....

base/test/test_suite.h

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_TEST_TEST_SUITE_H_
 #define BASE_TEST_TEST_SUITE_H_
 
 // Defines a basic test suite framework for running gtest based tests.  You can
 // instantiate this class in your main function and call its Run method to run
 // any gtest based tests that are linked into your executable.
@@ skipping 194 matching lines @@
 #if !defined(PURIFY)
       // When the code in this file moved around, bug 6436 resurfaced.
       // As a hack workaround, just #ifdef out this code for Purify builds.
       logging::SetLogAssertHandler(UnitTestAssertHandler);
 #endif  // !defined(PURIFY)
     }
 #endif  // defined(OS_WIN)
 
     icu_util::Initialize();
 
-#if defined(OS_POSIX) && !defined(OS_MACOSX)
+#if defined(USE_NSS)
     // Trying to repeatedly initialize and cleanup NSS and NSPR may result in
     // a deadlock. Such repeated initialization will happen when using test
     // isolation. Prevent problems by initializing NSS here, so that the cleanup
     // will be done only on process exit.
     base::EnsureNSSInit();
-#endif  // defined(OS_POSIX) && !defined(OS_MACOSX)
+#endif  // defined(USE_NSS)
   }
 
   virtual void Shutdown() {
   }
 
   // Make sure that we setup an AtExitManager so Singleton objects will be
   // destroyed.
   base::AtExitManager at_exit_manager_;
 };
 
 #endif  // BASE_TEST_TEST_SUITE_H_