Allow automatic use of stale cache entries if site is unreachable.

content/browser/loader/resource_dispatcher_host_impl.cc

Index: content/browser/loader/resource_dispatcher_host_impl.cc
diff --git a/content/browser/loader/resource_dispatcher_host_impl.cc b/content/browser/loader/resource_dispatcher_host_impl.cc
index 36fee38a162d26c4541a524014af9b185faba471..73fca9e188e09c3d41fcf1774baa2e361ab409af 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -311,6 +311,11 @@ int BuildLoadFlagsForRequest(const ResourceHostMsg_Request& request_data,
                    net::LOAD_DO_NOT_SAVE_COOKIES);
   }
 
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kEnableOfflineCacheAccess)) {
+    load_flags |= net::LOAD_CACHE_RETURN_IF_OFFLINE;
+  }
+
   // Raw headers are sensitive, as they include Cookie/Set-Cookie, so only
   // allow requesting them if requester has ReadRawCookies permission.
   if ((load_flags & net::LOAD_REPORT_RAW_HEADERS)