Fix bug 574524: DtlsTransportChannel crashes after SSL closes remotely

webrtc/p2p/base/dtlstransportchannel.h

 /*
  *  Copyright 2011 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 16 matching lines @@
 // the bottom and a StreamInterface on the top.
 class StreamInterfaceChannel : public rtc::StreamInterface {
  public:
   explicit StreamInterfaceChannel(TransportChannel* channel);
 
   // Push in a packet; this gets pulled out from Read().
   bool OnPacketReceived(const char* data, size_t size);
 
   // Implementations of StreamInterface
   rtc::StreamState GetState() const override { return state_; }
-  void Close() override { state_ = rtc::SS_CLOSED; }
+  void Close() override;
   rtc::StreamResult Read(void* buffer,
                          size_t buffer_len,
                          size_t* read,
                          int* error) override;
   rtc::StreamResult Write(const void* data,
                           size_t data_len,
                           size_t* written,
                           int* error) override;
 
  private:
@@ skipping 183 matching lines @@
   rtc::SSLProtocolVersion ssl_max_version_;
   rtc::Buffer remote_fingerprint_value_;
   std::string remote_fingerprint_algorithm_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(DtlsTransportChannelWrapper);
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_P2P_BASE_DTLSTRANSPORTCHANNEL_H_