Keep track of network error in ProxyRetryInfo.

net/proxy/proxy_service.h

 // 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.
 
 #ifndef NET_PROXY_PROXY_SERVICE_H_
 #define NET_PROXY_PROXY_SERVICE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 150 matching lines @@
   // bad will not be retried until |retry_delay| has passed. Returns true if
   // there will be at least one proxy remaining in the list after fallback and
   // false otherwise.
   bool MarkProxiesAsBadUntil(const ProxyInfo& results,
                              base::TimeDelta retry_delay,
                              const ProxyServer& another_bad_proxy,
                              const BoundNetLog& net_log);
 
   // Called to report that the last proxy connection succeeded.  If |proxy_info|
   // has a non empty proxy_retry_info map, the proxies that have been tried (and
-  // failed) for this request will be marked as bad.
-  void ReportSuccess(const ProxyInfo& proxy_info);
+  // failed) for this request will be marked as bad. |network_delegate| will
+  // be notified of any proxy fallbacks.
+  void ReportSuccess(const ProxyInfo& proxy_info,
+                     NetworkDelegate* network_delegate);
 
   // Call this method with a non-null |pac_request| to cancel the PAC request.
   void CancelPacRequest(PacRequest* pac_request);
 
   // Returns the LoadState for this |pac_request| which must be non-NULL.
   LoadState GetLoadState(const PacRequest* pac_request) const;
 
   // Sets the ProxyScriptFetcher and DhcpProxyScriptFetcher dependencies. This
   // is needed if the ProxyResolver is of type ProxyResolverWithoutFetch.
   // ProxyService takes ownership of both objects.
@@ skipping 241 matching lines @@
 
   // Whether child ProxyScriptDeciders should use QuickCheck
   bool quick_check_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyService);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_SERVICE_H_