Cache failover to LOAD_PREFERRING_CACHE if network response suggests offline.

net/http/http_response_info.cc

Index: net/http/http_response_info.cc
diff --git a/net/http/http_response_info.cc b/net/http/http_response_info.cc
index 9c33ab4f53e8b0bef1ef03cb6c82cf16f7b6152a..ca95a0aef8d3cd5837d6e75e42220aea35427258 100644
--- a/net/http/http_response_info.cc
+++ b/net/http/http_response_info.cc
@@ -87,6 +87,7 @@ enum {
 
 HttpResponseInfo::HttpResponseInfo()
     : was_cached(false),
+      server_data_unavailable(false),
       was_fetched_via_spdy(false),
       was_npn_negotiated(false),
       was_fetched_via_proxy(false) {
@@ -94,6 +95,7 @@ HttpResponseInfo::HttpResponseInfo()
 
 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),
@@ -114,6 +116,7 @@ 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;