Switch usage of _DEBUG macro to NDEBUG.

webrtc/base/opensslstreamadapter.cc

 /*
  *  Copyright 2004 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 976 matching lines @@
           DTLS1_2_VERSION : TLS1_2_VERSION);
       break;
   }
 #endif
 
   if (identity_ && !identity_->ConfigureIdentity(ctx)) {
     SSL_CTX_free(ctx);
     return NULL;
   }
 
-#ifdef _DEBUG
+#if !defined(NDEBUG)
   SSL_CTX_set_info_callback(ctx, OpenSSLAdapter::SSLInfoCallback);
 #endif
 
   int mode = SSL_VERIFY_PEER;
   if (client_auth_enabled()) {
     // Require a certificate from the client.
     // Note: Normally this is always true in production, but it may be disabled
     // for testing purposes (e.g. SSLAdapter unit tests).
     mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
   }
@@ skipping 159 matching lines @@
     }
   } else {
     RTC_NOTREACHED();
     return kDefaultSslEcCipher12;
   }
 }
 
 }  // namespace rtc
 
 #endif  // HAVE_OPENSSL_SSL_H