[Sync] Sync should run canary cycle after any network related error

sync/internal_api/http_bridge.cc

 // Copyright 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 "sync/internal_api/public/http_bridge.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <vector>
@@ skipping 494 matching lines @@
   if (!fetch_state_.url_poster)
     return;
 
   LogTimeout(true);
   DVLOG(1) << "Sync url fetch timed out. Canceling.";
 
   fetch_state_.end_time = base::Time::Now();
   fetch_state_.request_completed = true;
   fetch_state_.request_succeeded = false;
   fetch_state_.http_response_code = -1;
-  fetch_state_.error_code = net::URLRequestStatus::FAILED;
+  fetch_state_.error_code = net::ERR_TIMED_OUT;
 
   // This method is called by the timer, not the url fetcher implementation,
   // so it's safe to delete the fetcher here.
   delete fetch_state_.url_poster;
   fetch_state_.url_poster = NULL;
 
   // Timer is smart enough to handle being deleted as part of the invoked task.
   fetch_state_.http_request_timeout_timer.reset();
 
   // Wake the blocked syncer thread in MakeSynchronousPost.
@@ skipping 20 matching lines @@
   int64_t sane_time_ms = 0;
   if (base::StringToInt64(sane_time_str, &sane_time_ms)) {
     network_time_update_callback_.Run(
         base::Time::FromJsTime(sane_time_ms),
         base::TimeDelta::FromMilliseconds(1),
         fetch_state_.end_time - fetch_state_.start_time);
   }
 }
 
 }  // namespace syncer