Make gaia and oauth token fetchers recover from ERR_NETWORK_CHANGED.

google_apis/gaia/gaia_auth_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/gaia_auth_fetcher.h"
 
 #include <algorithm>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 209 matching lines @@
   DVLOG(2) << "Gaia fetcher headers: " << headers;
   DVLOG(2) << "Gaia fetcher body: " << body;
 
   // The Gaia token exchange requests do not require any cookie-based
   // identification as part of requests.  We suppress sending any cookies to
   // maintain a separation between the user's browsing and Chrome's internal
   // services.  Where such mixing is desired (MergeSession), it will be done
   // explicitly.
   to_return->SetLoadFlags(load_flags);
 
+  // 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
+  to_return->SetAutomaticallyRetryOnNetworkChanges(3);
+
   if (!headers.empty())
     to_return->SetExtraRequestHeaders(headers);
 
   return to_return;
 }
 
 // static
 std::string GaiaAuthFetcher::MakeClientLoginBody(
     const std::string& username,
     const std::string& password,
@@ skipping 876 matching lines @@
     NOTREACHED();
   }
 }
 
 // static
 bool GaiaAuthFetcher::IsSecondFactorSuccess(
     const std::string& alleged_error) {
   return alleged_error.find(kSecondFactor) !=
       std::string::npos;
 }