Revert of Delete cryptstring.h and cryptstring.cc.

webrtc/base/socketadapters.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_SOCKETADAPTERS_H_
 #define WEBRTC_BASE_SOCKETADAPTERS_H_
 
 #include <map>
 #include <string>
 
 #include "webrtc/base/asyncsocket.h"
 #include "webrtc/base/constructormagic.h"
+#include "webrtc/base/cryptstring.h"
 #include "webrtc/base/logging.h"
 
 namespace rtc {
 
 class ByteBufferReader;
 class ByteBufferWriter;
 
 ///////////////////////////////////////////////////////////////////////////////
 
 // Implements a socket adapter that can buffer and process data internally,
@@ skipping 59 matching lines @@
   explicit AsyncSSLServerSocket(AsyncSocket* socket);
 
  protected:
   void ProcessInput(char* data, size_t* len) override;
   RTC_DISALLOW_COPY_AND_ASSIGN(AsyncSSLServerSocket);
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_BASE_SOCKETADAPTERS_H_