Change DTLS default from 1.0 to 1.2 for webrtc.

webrtc/base/sslstreamadapterhelper.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 11 matching lines @@
 #include "webrtc/base/stream.h"
 
 namespace rtc {
 
 SSLStreamAdapterHelper::SSLStreamAdapterHelper(StreamInterface* stream)
     : SSLStreamAdapter(stream),
       state_(SSL_NONE),
       role_(SSL_CLIENT),
       ssl_error_code_(0),  // Not meaningful yet
       ssl_mode_(SSL_MODE_TLS),
-      ssl_max_version_(SSL_PROTOCOL_TLS_11) {
-}
+      ssl_max_version_(SSL_PROTOCOL_TLS_12) {}
 
 SSLStreamAdapterHelper::~SSLStreamAdapterHelper() = default;
 
 void SSLStreamAdapterHelper::SetIdentity(SSLIdentity* identity) {
   ASSERT(identity_.get() == NULL);
   identity_.reset(identity);
 }
 
 void SSLStreamAdapterHelper::SetServerRole(SSLRole role) {
   role_ = role;
@@ skipping 92 matching lines @@
   if (err) {
     Error("BeginSSL", err, false);
     return err;
   }
 
   return 0;
 }
 
 }  // namespace rtc