Revert of Removing #defines previously used for building without BoringSSL/OpenSSL.

webrtc/base/ssladapter_unittest.cc

 /*
  *  Copyright 2014 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 352 matching lines @@
   SSLAdapterTestDTLS_RSA()
       : SSLAdapterTestBase(rtc::SSL_MODE_DTLS, rtc::KeyParams::RSA()) {}
 };
 
 class SSLAdapterTestDTLS_ECDSA : public SSLAdapterTestBase {
  public:
   SSLAdapterTestDTLS_ECDSA()
       : SSLAdapterTestBase(rtc::SSL_MODE_DTLS, rtc::KeyParams::ECDSA()) {}
 };
 
+#if SSL_USE_OPENSSL
+
 // Basic tests: TLS
 
 // Test that handshake works, using RSA
 TEST_F(SSLAdapterTestTLS_RSA, TestTLSConnect) {
   TestHandshake(true);
 }
 
 // Test that handshake works, using ECDSA
 TEST_F(SSLAdapterTestTLS_ECDSA, TestTLSConnect) {
   TestHandshake(true);
@@ skipping 27 matching lines @@
 TEST_F(SSLAdapterTestDTLS_RSA, TestDTLSTransfer) {
   TestHandshake(true);
   TestTransfer("Hello, world!");
 }
 
 // Test transfer between client and server, using ECDSA
 TEST_F(SSLAdapterTestDTLS_ECDSA, TestDTLSTransfer) {
   TestHandshake(true);
   TestTransfer("Hello, world!");
 }
+
+#endif  // SSL_USE_OPENSSL