Make gaia and oauth token fetchers recover from ERR_NETWORK_CHANGED.

google_apis/gaia/oauth2_revocation_fetcher.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 "google_apis/gaia/oauth2_revocation_fetcher.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 44 matching lines @@
                                  URLFetcherDelegate* delegate) {
   bool empty_body = body.empty();
   URLFetcher* result = net::URLFetcher::Create(
       0, url,
       empty_body ? URLFetcher::GET : URLFetcher::POST,
       delegate);
 
   result->SetRequestContext(getter);
   result->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
                        net::LOAD_DO_NOT_SAVE_COOKIES);
+  // Fetchers are sometimes cancelled because a network change was detected,
+  // especially at startup and after sign-in on ChromeOS. Retrying once should
+  // be enough in those cases; let the fetcher retry up to 3 times just in case.
+  // http://crbug.com/163710
+  result->SetAutomaticallyRetryOnNetworkChanges(3);
   if (!header.empty())
     result->SetExtraRequestHeaders(header);
 
   if (!empty_body)
     result->SetUploadData("application/x-www-form-urlencoded", body);
 
   return result;
 }
 }  // namespace
 
@@ skipping 81 matching lines @@
 std::string OAuth2RevocationFetcher::MakeRevocationBody(
     const std::string& client_id,
     const std::string& origin) {
   std::string enc_client_id = net::EscapeUrlEncodedData(client_id, true);
   std::string enc_origin = net::EscapeUrlEncodedData(origin, true);
   return StringPrintf(
       kRevocationBodyFormat,
       enc_client_id.c_str(),
       enc_origin.c_str());
 }