Handle the case where the update check for components fails.

components/update_client/update_engine.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/update_engine.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 201 matching lines @@
       FROM_HERE, base::Bind(&UpdateEngine::UpdateCheckComplete,
                             base::Unretained(this), it));
 }
 
 void UpdateEngine::UpdateCheckComplete(const UpdateContextIterator& it) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   const auto& update_context = *it;
   DCHECK(update_context);
 
-  if (update_context->update_check_error) {
-    base::ThreadTaskRunnerHandle::Get()->PostTask(
-        FROM_HERE,
-        base::Bind(&UpdateEngine::UpdateComplete, base::Unretained(this), it,
-                   Error::UPDATE_CHECK_ERROR));
-    return;
-  }
-
   for (const auto& id : update_context->ids)
     update_context->component_queue.push(id);
 
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&UpdateEngine::HandleComponent, base::Unretained(this), it));
 }
 
 void UpdateEngine::HandleComponent(const UpdateContextIterator& it) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   auto& update_context = *it;
   DCHECK(update_context);
 
   auto& queue = update_context->component_queue;
 
   if (queue.empty()) {
+    const Error error = update_context->update_check_error
+                            ? Error::UPDATE_CHECK_ERROR
+                            : Error::NONE;
     base::ThreadTaskRunnerHandle::Get()->PostTask(
         FROM_HERE, base::Bind(&UpdateEngine::UpdateComplete,
-                              base::Unretained(this), it, Error::NONE));
+                              base::Unretained(this), it, error));
     return;
   }
 
   const auto& id = queue.front();
   DCHECK_EQ(1u, update_context->components.count(id));
   const auto& component = update_context->components.at(id);
   DCHECK(component);
 
   auto& next_update_delay = (*it)->next_update_delay;
   if (!next_update_delay.is_zero() && component->IsUpdateAvailable()) {
@@ skipping 106 matching lines @@
   component->Uninstall(version, reason);
 
   update_context->component_queue.push(id);
 
   base::ThreadTaskRunnerHandle::Get()->PostTask(
       FROM_HERE,
       base::Bind(&UpdateEngine::HandleComponent, base::Unretained(this), it));
 }
 
 }  // namespace update_client