Enable login screen apps.

chrome/browser/extensions/chrome_process_manager_delegate.h

 // Copyright 2014 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_EXTENSIONS_CHROME_PROCESS_MANAGER_DELEGATE_H_
 #define CHROME_BROWSER_EXTENSIONS_CHROME_PROCESS_MANAGER_DELEGATE_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "extensions/browser/process_manager_delegate.h"
 
 class Browser;
 class Profile;
 
 namespace extensions {
 
 // Support for ProcessManager. Controls cases where Chrome wishes to disallow
 // extension background pages or defer their creation.
 class ChromeProcessManagerDelegate : public ProcessManagerDelegate,
                                      public content::NotificationObserver {
  public:
   ChromeProcessManagerDelegate();
   ~ChromeProcessManagerDelegate() override;
 
   // ProcessManagerDelegate implementation:
-  bool IsBackgroundPageAllowed(content::BrowserContext* context) const override;
+  bool IsBackgroundPageAllowed(content::BrowserContext* context,
+                               const Extension* extension) const override;
   bool DeferCreatingStartupBackgroundHosts(
       content::BrowserContext* context) const override;
 
   // content::NotificationObserver implementation:
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 
  private:
   // Notification handlers.
   void OnBrowserWindowReady(Browser* browser);
   void OnProfileCreated(Profile* profile);
   void OnProfileDestroyed(Profile* profile);
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeProcessManagerDelegate);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_CHROME_PROCESS_MANAGER_DELEGATE_H_