Add a GetAlternativeService method to HttpStream to return any

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 <stdint.h>
 
 #include <memory>
@@ skipping 43 matching lines @@
   int ReadResponseBody(IOBuffer* buf,
                        int buf_len,
                        const CompletionCallback& callback) override;
   void Close(bool not_reusable) override;
   bool IsResponseBodyComplete() const override;
   bool IsConnectionReused() const override;
   void SetConnectionReused() override;
   bool CanReuseConnection() const override;
   int64_t GetTotalReceivedBytes() const override;
   int64_t GetTotalSentBytes() const override;
+  bool GetAlternativeService(
+      AlternativeService* alternative_service) const override;
   bool GetLoadTimingInfo(LoadTimingInfo* load_timing_info) const override;
   void GetSSLInfo(SSLInfo* ssl_info) override;
   void GetSSLCertRequestInfo(SSLCertRequestInfo* cert_request_info) override;
   bool GetRemoteEndpoint(IPEndPoint* endpoint) override;
   Error GetTokenBindingSignature(crypto::ECPrivateKey* key,
                                  TokenBindingType tb_type,
                                  std::vector<uint8_t>* out) override;
   void Drain(HttpNetworkSession* session) override;
   void SetPriority(RequestPriority priority) override;
   void PopulateNetErrorDetails(NetErrorDetails* details) override;
@@ skipping 67 matching lines @@
   std::unique_ptr<WebSocketExtensionParams> extension_params_;
 
   WebSocketStreamRequest* stream_request_;
 
   DISALLOW_COPY_AND_ASSIGN(WebSocketBasicHandshakeStream);
 };
 
 }  // namespace net
 
 #endif  // NET_WEBSOCKETS_WEBSOCKET_BASIC_HANDSHAKE_STREAM_H_