Switch usage of _DEBUG macro to NDEBUG.

webrtc/base/unittest_main.cc

 /*
  *  Copyright 2007 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 //
@@ skipping 60 matching lines @@
   webrtc::test::InitFieldTrialsFromString(FLAG_force_fieldtrials);
 
 #if defined(WEBRTC_WIN)
   if (!FLAG_default_error_handlers) {
     // Make sure any errors don't throw dialogs hanging the test run.
     _set_invalid_parameter_handler(TestInvalidParameterHandler);
     _set_purecall_handler(TestPureCallHandler);
     _CrtSetReportHook2(_CRT_RPTHOOK_INSTALL, TestCrtReportHandler);
   }
 
-#ifdef _DEBUG  // Turn on memory leak checking on Windows.
+#if !defined(NDEBUG)  // Turn on memory leak checking on Windows.
   _CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF |_CRTDBG_LEAK_CHECK_DF);
   if (FLAG_crt_break_alloc >= 0) {
     _crtBreakAlloc = FLAG_crt_break_alloc;
   }
-#endif  // _DEBUG
+#endif
 #endif  // WEBRTC_WIN
 
   rtc::Filesystem::SetOrganizationName("google");
   rtc::Filesystem::SetApplicationName("unittest");
 
   // By default, log timestamps. Allow overrides by used of a --log flag.
   rtc::LogMessage::LogTimestamps();
   if (*FLAG_log != '\0') {
     rtc::LogMessage::ConfigureLogging(FLAG_log);
   }
@@ skipping 10 matching lines @@
 
 #if defined(WEBRTC_WIN)
   // Unhook crt function so that we don't ever log after statics have been
   // uninitialized.
   if (!FLAG_default_error_handlers)
     _CrtSetReportHook2(_CRT_RPTHOOK_REMOVE, TestCrtReportHandler);
 #endif
 
   return res;
 }