Remove unused "Disable remote Alt-Svc" QUIC experiment code.

net/http/http_network_session.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_HTTP_HTTP_NETWORK_SESSION_H_
 #define NET_HTTP_HTTP_NETWORK_SESSION_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 95 matching lines @@
     bool enable_spdy_ping_based_connection_checking;
     bool enable_http2;
     size_t spdy_session_max_recv_window_size;
     // HTTP/2 connection settings.
     // Unknown settings will still be sent to the server.
     SettingsMap http2_settings;
     // Source of time for SPDY connections.
     SpdySessionPool::TimeFunc time_func;
     // Whether to enable HTTP/2 Alt-Svc entries.
     bool enable_http2_alternative_service;
-    // Whether to enable QUIC Alt-Svc entries with hostname different than that
-    // of the origin.
-    bool enable_quic_alternative_service_with_different_host;
 
     // Enables QUIC support.
     bool enable_quic;
     // Marks a QUIC server broken when a connection blackholes after the
     // handshake is confirmed.
     bool mark_quic_broken_when_network_blackholes;
     // Retry requests which fail with QUIC_PROTOCOL_ERROR, and mark QUIC
     // broken if the retry succeeds.
     bool retry_without_alt_svc_on_quic_errors;
     // If not zero, the task to load QUIC server configs from the disk cache
@@ skipping 209 matching lines @@
   NextProtoVector next_protos_;
 
   Params params_;
 
   std::unique_ptr<base::MemoryPressureListener> memory_pressure_listener_;
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_NETWORK_SESSION_H_