Introduce ERR_NETWORK_CHANGED and allow URLFetcher to automatically retry on that error.

chrome/browser/translate/translate_manager.cc

 // 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.
 
 #include "chrome/browser/translate/translate_manager.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/json/json_reader.h"
@@ skipping 821 matching lines @@
       base::StringPrintf(
           kLanguageListFetchURL,
           GetLanguageCode(g_browser_process->GetApplicationLocale()).c_str()));
   AddApiKeyToUrl(&language_list_fetch_url);
   language_list_request_pending_.reset(net::URLFetcher::Create(
       1, language_list_fetch_url, net::URLFetcher::GET, this));
   language_list_request_pending_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
                                                net::LOAD_DO_NOT_SAVE_COOKIES);
   language_list_request_pending_->SetRequestContext(
       g_browser_process->system_request_context());
-  language_list_request_pending_->SetMaxRetries(kMaxRetryLanguageListFetch);
+  language_list_request_pending_->SetMaxRetriesOn5xx(
+      kMaxRetryLanguageListFetch);
   language_list_request_pending_->Start();
 }
 
 void TranslateManager::CleanupPendingUlrFetcher() {
   language_list_request_pending_.reset();
   translate_script_request_pending_.reset();
 }
 
 void TranslateManager::RequestTranslateScript() {
   if (translate_script_request_pending_.get() != NULL)
@@ skipping 67 matching lines @@
 
   for (size_t i = 0; i < infobar_helper->GetInfoBarCount(); ++i) {
     TranslateInfoBarDelegate* delegate =
         infobar_helper->GetInfoBarDelegateAt(i)->
             AsTranslateInfoBarDelegate();
     if (delegate)
       return delegate;
   }
   return NULL;
 }