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

sync/internal_api/http_bridge.cc

Index: sync/internal_api/http_bridge.cc
diff --git a/sync/internal_api/http_bridge.cc b/sync/internal_api/http_bridge.cc
index 842adf3aba06a5b39cbdb2d157c93c1dba1cb8aa..b8d57cc5b26d0bc965134460a85bd4e7afd41eb9 100644
--- a/sync/internal_api/http_bridge.cc
+++ b/sync/internal_api/http_bridge.cc
@@ -512,7 +512,7 @@ void HttpBridge::OnURLFetchTimedOut() {
   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.