Revert of Change initial DTLS retransmission timer from 1 second to 50ms.

webrtc/base/opensslstreamadapter.cc

Index: webrtc/base/opensslstreamadapter.cc
diff --git a/webrtc/base/opensslstreamadapter.cc b/webrtc/base/opensslstreamadapter.cc
index c2cf00779a2d9a2cde230b9ea1af65e42189eea9..abdf5e4834cdecaa6319766e4147d4ea713e525e 100644
--- a/webrtc/base/opensslstreamadapter.cc
+++ b/webrtc/base/opensslstreamadapter.cc
@@ -771,19 +771,13 @@
   SSL_set_app_data(ssl_, this);
 
   SSL_set_bio(ssl_, bio, bio);  // the SSL object owns the bio now.
+#ifndef OPENSSL_IS_BORINGSSL
   if (ssl_mode_ == SSL_MODE_DTLS) {
-#ifdef OPENSSL_IS_BORINGSSL
-    // Change the initial retransmission timer from 1 second to 50ms.
-    // This will likely result in some spurious retransmissions, but
-    // it's useful for ensuring a timely handshake when there's packet
-    // loss.
-    DTLSv1_set_initial_timeout_duration(ssl_, 50);
-#else
     // Enable read-ahead for DTLS so whole packets are read from internal BIO
     // before parsing. This is done internally by BoringSSL for DTLS.
     SSL_set_read_ahead(ssl_, 1);
-#endif
-  }
+  }
+#endif
 
   SSL_set_mode(ssl_, SSL_MODE_ENABLE_PARTIAL_WRITE |
                SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER);