Allow fallback from https to http for component update checks.

components/update_client/action_update_check.cc

 // Copyright 2015 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 "components/update_client/action_update_check.h"
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 79 matching lines @@
   }
 
   update_checker_->CheckForUpdates(
       update_context_->update_items, extra_request_parameters_,
       base::Bind(&ActionUpdateCheck::UpdateCheckComplete,
                  base::Unretained(this)));
 }
 
 void ActionUpdateCheck::UpdateCheckComplete(
     int error,
-    const UpdateResponse::Results& results) {
+    const UpdateResponse::Results& results,
+    int retry_after_sec) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
+  update_context_->retry_after_sec_ = retry_after_sec;
+
   if (!error)
     OnUpdateCheckSucceeded(results);
   else
     OnUpdateCheckFailed(error);
 }
 
 void ActionUpdateCheck::OnUpdateCheckSucceeded(
     const UpdateResponse::Results& results) {
   DCHECK(thread_checker_.CalledOnValidThread());
   VLOG(1) << "Update check succeeded.";
@@ skipping 87 matching lines @@
 
   VLOG(1) << "Update check failed." << error;
 
   ChangeAllItemsState(CrxUpdateItem::State::kChecking,
                       CrxUpdateItem::State::kNoUpdate);
 
   UpdateComplete(error);
 }
 
 }  // namespace update_client