Revert of Remove code interfacing legacy openssl.

webrtc/base/openssladapter.h

 /*
  *  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.
  */
 
 #ifndef WEBRTC_BASE_OPENSSLADAPTER_H__
 #define WEBRTC_BASE_OPENSSLADAPTER_H__
 
 #include <string>
 #include "webrtc/base/messagehandler.h"
 #include "webrtc/base/messagequeue.h"
 #include "webrtc/base/ssladapter.h"
 
 typedef struct ssl_st SSL;
 typedef struct ssl_ctx_st SSL_CTX;
 typedef struct x509_store_ctx_st X509_STORE_CTX;
 
 namespace rtc {
 
 ///////////////////////////////////////////////////////////////////////////////
 
 class OpenSSLAdapter : public SSLAdapter, public MessageHandler {
 public:
   static bool InitializeSSL(VerificationCallback callback);
+  static bool InitializeSSLThread();
+  static bool CleanupSSL();
 
   OpenSSLAdapter(AsyncSocket* socket);
   ~OpenSSLAdapter() override;
 
   void SetMode(SSLMode mode) override;
   int StartSSL(const char* hostname, bool restartable) override;
   int Send(const void* pv, size_t cb) override;
   int SendTo(const void* pv, size_t cb, const SocketAddress& addr) override;
   int Recv(void* pv, size_t cb) override;
   int RecvFrom(void* pv, size_t cb, SocketAddress* paddr) override;
@@ skipping 48 matching lines @@
   SSLMode ssl_mode_;
 
   bool custom_verification_succeeded_;
 };
 
 /////////////////////////////////////////////////////////////////////////////
 
 } // namespace rtc
 
 #endif // WEBRTC_BASE_OPENSSLADAPTER_H__