Fail WebSocket channel when handshake fails.

net/websockets/websocket_basic_handshake_stream.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_WEBSOCKETS_WEBSOCKET_BASIC_HANDSHAKE_STREAM_H_
 #define NET_WEBSOCKETS_WEBSOCKET_BASIC_HANDSHAKE_STREAM_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 53 matching lines @@
   // have been received. It creates an appropriate subclass of WebSocketStream
   // depending on what extensions were negotiated. This object is unusable after
   // Upgrade() has been called and should be disposed of as soon as possible.
   virtual scoped_ptr<WebSocketStream> Upgrade() OVERRIDE;
 
   // Set the value used for the next Sec-WebSocket-Key header
   // deterministically. The key is only used once, and then discarded.
   // For tests only.
   void SetWebSocketKeyForTesting(const std::string& key);
 
+  virtual std::string FailureMessage() const OVERRIDE;
+
  private:
   // A wrapper for the ReadResponseHeaders callback that checks whether or not
   // the connection has been accepted.
   void ReadResponseHeadersCallback(const CompletionCallback& callback,
                                    int result);
 
   // Validates the response from the server and returns OK or
   // ERR_INVALID_RESPONSE.
   int ValidateResponse();
 
@@ skipping 22 matching lines @@
 
   // The extensions we requested.
   std::vector<std::string> requested_extensions_;
 
   // The sub-protocol selected by the server.
   std::string sub_protocol_;
 
   // The extension(s) selected by the server.
   std::string extensions_;
 
+  std::string failure_message_;
+
   DISALLOW_COPY_AND_ASSIGN(WebSocketBasicHandshakeStream);
 };
 
 }  // namespace net
 
 #endif  // NET_WEBSOCKETS_WEBSOCKET_BASIC_HANDSHAKE_STREAM_H_