Revert of Remove code interfacing legacy openssl.

webrtc/base/openssladapter.h

Index: webrtc/base/openssladapter.h
diff --git a/webrtc/base/openssladapter.h b/webrtc/base/openssladapter.h
index 14d8bea4f5ff7aafda9ee714d5064e346a768841..cdf45e603f31a8ba7b75f653268fcbc94d84cdb6 100644
--- a/webrtc/base/openssladapter.h
+++ b/webrtc/base/openssladapter.h
@@ -27,6 +27,8 @@
 class OpenSSLAdapter : public SSLAdapter, public MessageHandler {
 public:
   static bool InitializeSSL(VerificationCallback callback);
+  static bool InitializeSSLThread();
+  static bool CleanupSSL();
 
   OpenSSLAdapter(AsyncSocket* socket);
   ~OpenSSLAdapter() override;