Allow fallback from https to http for component update checks.

components/update_client/action_update.cc

Index: components/update_client/action_update.cc
diff --git a/components/update_client/action_update.cc b/components/update_client/action_update.cc
index ea0ad6e1862721c8d2cb901d701b1fb69f869630..c8045a2fa58b13a570aa084c960f66093d105521 100644
--- a/components/update_client/action_update.cc
+++ b/components/update_client/action_update.cc
@@ -294,7 +294,7 @@ bool ActionUpdateFull::IsBackgroundDownload(const CrxUpdateItem* item) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   // On demand component updates are always downloaded in foreground.
-  return !item->on_demand && item->component.allow_background_download &&
+  return !item->on_demand && item->component.allows_background_download &&
          update_context_->config->UseBackgroundDownloader();
 }