Fixed channel switch when user decides to switch to another channel in

chrome/browser/ui/webui/help/version_updater_chromeos.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_HELP_VERSION_UPDATER_CHROMEOS_H_
 #define CHROME_BROWSER_UI_WEBUI_HELP_VERSION_UPDATER_CHROMEOS_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/ui/webui/help/version_updater.h"
@@ skipping 13 matching lines @@
   // Gets the last update status, without triggering a new check or download.
   void GetUpdateStatus(const StatusCallback& callback);
 
  protected:
   friend class VersionUpdater;
 
   // Clients must use VersionUpdater::Create().
   VersionUpdaterCros();
   virtual ~VersionUpdaterCros();
 
+  // Returns whether an update is allowed. If not, it calls the callback with
+  // the appropriate status. May be overridden in tests.
+  virtual bool EnsureCanUpdate(const StatusCallback& callback);
+
  private:
   // UpdateEngineClient::Observer implementation.
   virtual void UpdateStatusChanged(
       const chromeos::UpdateEngineClient::Status& status) OVERRIDE;
 
   // Callback from UpdateEngineClient::RequestUpdateCheck().
   void OnUpdateCheck(chromeos::UpdateEngineClient::UpdateCheckResult result);
 
   // Callback used to communicate update status to the client.
   StatusCallback callback_;
 
   // Last state received via UpdateStatusChanged().
   chromeos::UpdateEngineClient::UpdateStatusOperation last_operation_;
 
+  // True if an update check should be scheduled when the update engine is idle.
+  bool check_for_update_when_idle_;
+
   base::WeakPtrFactory<VersionUpdaterCros> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VersionUpdaterCros);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_HELP_VERSION_UPDATER_CHROMEOS_H_