Cache failover to LOAD_PREFERRING_CACHE if network response suggests offline.

net/http/http_response_info.cc

 // 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.
 
 #include "net/http/http_response_info.h"
 
 #include "base/logging.h"
 #include "base/pickle.h"
 #include "base/time.h"
 #include "net/base/auth.h"
@@ skipping 72 matching lines @@
 
   // This bit is set if the response info has connection info.
   RESPONSE_INFO_HAS_CONNECTION_INFO = 1 << 18,
 
   // TODO(darin): Add other bits to indicate alternate request methods.
   // For now, we don't support storing those.
 };
 
 HttpResponseInfo::HttpResponseInfo()
     : was_cached(false),
+      server_data_unavailable(false),
       was_fetched_via_spdy(false),
       was_npn_negotiated(false),
       was_fetched_via_proxy(false),
       connection_info(CONNECTION_INFO_UNKNOWN) {
 }
 
 HttpResponseInfo::HttpResponseInfo(const HttpResponseInfo& rhs)
     : was_cached(rhs.was_cached),
+      server_data_unavailable(rhs.server_data_unavailable),
       was_fetched_via_spdy(rhs.was_fetched_via_spdy),
       was_npn_negotiated(rhs.was_npn_negotiated),
       was_fetched_via_proxy(rhs.was_fetched_via_proxy),
       socket_address(rhs.socket_address),
       npn_negotiated_protocol(rhs.npn_negotiated_protocol),
       connection_info(rhs.connection_info),
       request_time(rhs.request_time),
       response_time(rhs.response_time),
       auth_challenge(rhs.auth_challenge),
       cert_request_info(rhs.cert_request_info),
       ssl_info(rhs.ssl_info),
       headers(rhs.headers),
       vary_data(rhs.vary_data),
       metadata(rhs.metadata) {
 }
 
 HttpResponseInfo::~HttpResponseInfo() {
 }
 
 HttpResponseInfo& HttpResponseInfo::operator=(const HttpResponseInfo& rhs) {
   was_cached = rhs.was_cached;
+  server_data_unavailable = rhs.server_data_unavailable;
   was_fetched_via_spdy = rhs.was_fetched_via_spdy;
   was_npn_negotiated = rhs.was_npn_negotiated;
   was_fetched_via_proxy = rhs.was_fetched_via_proxy;
   socket_address = rhs.socket_address;
   npn_negotiated_protocol = rhs.npn_negotiated_protocol;
   request_time = rhs.request_time;
   response_time = rhs.response_time;
   auth_challenge = rhs.auth_challenge;
   cert_request_info = rhs.cert_request_info;
   ssl_info = rhs.ssl_info;
@@ skipping 173 matching lines @@
   pickle->WriteUInt16(socket_address.port());
 
   if (was_npn_negotiated)
     pickle->WriteString(npn_negotiated_protocol);
 
   if (connection_info != CONNECTION_INFO_UNKNOWN)
     pickle->WriteInt(static_cast<int>(connection_info));
 }
 
 }  // namespace net