Keep track of network error in ProxyRetryInfo.

chrome/browser/net/chrome_network_delegate.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 CHROME_BROWSER_NET_CHROME_NETWORK_DELEGATE_H_
 #define CHROME_BROWSER_NET_CHROME_NETWORK_DELEGATE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 182 matching lines @@
  private:
   friend class ChromeNetworkDelegateTest;
 
   // NetworkDelegate implementation.
   virtual int OnBeforeURLRequest(net::URLRequest* request,
                                  const net::CompletionCallback& callback,
                                  GURL* new_url) OVERRIDE;
   virtual void OnResolveProxy(
       const GURL& url, int load_flags, net::ProxyInfo* result) OVERRIDE;
   virtual void OnProxyFallback(const net::ProxyServer& bad_proxy,
-                               int net_error,
-                               bool did_fallback) OVERRIDE;
+                               int net_error) OVERRIDE;
   virtual int OnBeforeSendHeaders(net::URLRequest* request,
                                   const net::CompletionCallback& callback,
                                   net::HttpRequestHeaders* headers) OVERRIDE;
   virtual void OnBeforeSendProxyHeaders(
       net::URLRequest* request,
       const net::ProxyInfo& proxy_info,
       net::HttpRequestHeaders* headers) OVERRIDE;
   virtual void OnSendHeaders(net::URLRequest* request,
                              const net::HttpRequestHeaders& headers) OVERRIDE;
   virtual int OnHeadersReceived(
@@ skipping 89 matching lines @@
       data_reduction_proxy_usage_stats_;
   data_reduction_proxy::DataReductionProxyAuthRequestHandler*
   data_reduction_proxy_auth_request_handler_;
 
   OnResolveProxyHandler on_resolve_proxy_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeNetworkDelegate);
 };
 
 #endif  // CHROME_BROWSER_NET_CHROME_NETWORK_DELEGATE_H_