Fail WebSocket channel when handshake fails.

net/websockets/websocket_basic_handshake_stream.h

Index: net/websockets/websocket_basic_handshake_stream.h
diff --git a/net/websockets/websocket_basic_handshake_stream.h b/net/websockets/websocket_basic_handshake_stream.h
index 69deca2dcf8a1db443d0344f0cdd6652d0e6c0d5..8fb1dc04b3c7c53accaa195664f96e50c51f82eb 100644
--- a/net/websockets/websocket_basic_handshake_stream.h
+++ b/net/websockets/websocket_basic_handshake_stream.h
@@ -71,6 +71,8 @@ class NET_EXPORT_PRIVATE WebSocketBasicHandshakeStream
   // 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.
@@ -113,6 +115,8 @@ class NET_EXPORT_PRIVATE WebSocketBasicHandshakeStream
   // The extension(s) selected by the server.
   std::string extensions_;
 
+  std::string failure_message_;
+
   DISALLOW_COPY_AND_ASSIGN(WebSocketBasicHandshakeStream);
 };