Add a GetAlternativeService method to HttpStream to return any

net/spdy/spdy_http_stream.h

 // Copyright (c) 2012 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_SPDY_SPDY_HTTP_STREAM_H_
 #define NET_SPDY_SPDY_HTTP_STREAM_H_
 
 #include <stdint.h>
 
 #include <list>
@@ skipping 56 matching lines @@
 
   // Total number of bytes received over the network of SPDY data, headers, and
   // push_promise frames associated with this stream, including the size of
   // frame headers, after SSL decryption and not including proxy overhead.
   int64_t GetTotalReceivedBytes() const override;
   // Total number of bytes sent over the network of SPDY frames associated with
   // this stream, including the size of frame headers, before SSL encryption and
   // not including proxy overhead. Note that some SPDY frames such as pings are
   // not associated with any stream, and are not included in this value.
   int64_t GetTotalSentBytes() const override;
+  bool GetAlternativeService(
+      AlternativeService* alternative_service) const override;
   bool GetLoadTimingInfo(LoadTimingInfo* load_timing_info) const override;
   bool GetRemoteEndpoint(IPEndPoint* endpoint) override;
   void PopulateNetErrorDetails(NetErrorDetails* details) override;
   void SetPriority(RequestPriority priority) override;
 
   // SpdyStream::Delegate implementation.
   void OnHeadersSent() override;
   void OnHeadersReceived(const SpdyHeaderBlock& response_headers) override;
   void OnDataReceived(std::unique_ptr<SpdyBuffer> buffer) override;
   void OnDataSent() override;
@@ skipping 110 matching lines @@
   bool was_alpn_negotiated_;
 
   base::WeakPtrFactory<SpdyHttpStream> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SpdyHttpStream);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_HTTP_STREAM_H_