Implement CUP signing in UpdateClient.

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 78 matching lines @@
     ignore_result(item.release());
   }
 
   update_checker_->CheckForUpdates(
       update_context_->update_items, extra_request_parameters_,
       base::Bind(&ActionUpdateCheck::UpdateCheckComplete,
                  base::Unretained(this)));
 }
 
 void ActionUpdateCheck::UpdateCheckComplete(
-    const GURL& original_url,
     int error,
-    const std::string& error_message,
     const UpdateResponse::Results& results) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
-  VLOG(1) << "Update check completed from: " << original_url.spec();
-
   if (!error)
     OnUpdateCheckSucceeded(results);
   else
-    OnUpdateCheckFailed(error, error_message);
+    OnUpdateCheckFailed(error);
 }
 
 void ActionUpdateCheck::OnUpdateCheckSucceeded(
     const UpdateResponse::Results& results) {
   DCHECK(thread_checker_.CalledOnValidThread());
   VLOG(1) << "Update check succeeded.";
   std::vector<UpdateResponse::Result>::const_iterator it;
   for (it = results.list.begin(); it != results.list.end(); ++it) {
     CrxUpdateItem* crx = FindUpdateItemById(it->extension_id);
     if (!crx)
@@ skipping 70 matching lines @@
   if (update_context_->queue.empty()) {
     VLOG(1) << "Update check completed but no update is needed.";
     UpdateComplete(0);
     return;
   }
 
   // Starts the execution flow of updating the CRXs in this context.
   UpdateCrx();
 }
 
-void ActionUpdateCheck::OnUpdateCheckFailed(int error,
-                                            const std::string& error_message) {
+void ActionUpdateCheck::OnUpdateCheckFailed(int error) {
   DCHECK(thread_checker_.CalledOnValidThread());
   DCHECK(error);
 
   VLOG(1) << "Update check failed." << error;
 
   ChangeAllItemsState(CrxUpdateItem::State::kChecking,
                       CrxUpdateItem::State::kNoUpdate);
 
   UpdateComplete(error);
 }
 
 }  // namespace update_client