Update from https://crrev.com/311076

net/http/http_response_info.h

 // Copyright (c) 2011 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_RESPONSE_INFO_H_
 #define NET_HTTP_HTTP_RESPONSE_INFO_H_
 
 #include <string>
 
 #include "base/time/time.h"
@@ skipping 77 matching lines @@
   // True if the request was fetched via an explicit proxy.  The proxy could
   // be any type of proxy, HTTP or SOCKS.  Note, we do not know if a
   // transparent proxy may have been involved. If true, |proxy_server| contains
   // the name of the proxy server that was used.
   bool was_fetched_via_proxy;
   HostPortPair proxy_server;
 
   // Whether the request use http proxy or server authentication.
   bool did_use_http_auth;
 
+  // True if the resource was originally fetched for a prefetch and has not been
+  // used since.
+  bool unused_since_prefetch;
+
   // Remote address of the socket which fetched this resource.
   //
   // NOTE: If the response was served from the cache (was_cached is true),
   // the socket address will be set to the address that the content came from
   // originally.  This is true even if the response was re-validated using a
   // different remote address, or if some of the content came from a byte-range
   // request to a different address.
   HostPortPair socket_address;
 
   // Protocol negotiated with the server.
@@ skipping 33 matching lines @@
   scoped_refptr<IOBufferWithSize> metadata;
 
   static ConnectionInfo ConnectionInfoFromNextProto(NextProto next_proto);
 
   static std::string ConnectionInfoToString(ConnectionInfo connection_info);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_RESPONSE_INFO_H_