Keep track of network error in ProxyRetryInfo.

net/proxy/proxy_list.h

Index: net/proxy/proxy_list.h
diff --git a/net/proxy/proxy_list.h b/net/proxy/proxy_list.h
index ac9635a977acbb173d3a1059370159ac071c5dd7..10d57eaeafbde4d1b7f8f47c380ffbc0f2416318 100644
--- a/net/proxy/proxy_list.h
+++ b/net/proxy/proxy_list.h
@@ -82,6 +82,7 @@ class NET_EXPORT_PRIVATE ProxyList {
   // list of known bad proxies is given by proxy_retry_info.  Returns true if
   // there is another server available in the list.
   bool Fallback(ProxyRetryInfoMap* proxy_retry_info,
+                const int net_error,
                 const BoundNetLog& net_log);
 
   // Updates |proxy_retry_info| to indicate that the first proxy in the list
@@ -96,6 +97,7 @@ class NET_EXPORT_PRIVATE ProxyList {
       base::TimeDelta retry_delay,
       bool reconsider,
       const ProxyServer& another_proxy_to_bypass,
+      const int net_error,
       const BoundNetLog& net_log) const;
 
  private:
@@ -106,6 +108,7 @@ class NET_EXPORT_PRIVATE ProxyList {
                            base::TimeDelta retry_delay,
                            bool try_while_bad,
                            const ProxyServer& proxy_to_retry,
+                           const int net_error,
                            const BoundNetLog& net_log) const;
 
   // List of proxies.