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      1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_EXTENSIONS_EXTERNAL_POLICY_EXTENSION_LOADER_H_
      6 #define CHROME_BROWSER_EXTENSIONS_EXTERNAL_POLICY_EXTENSION_LOADER_H_
      7 #pragma once
      8 
      9 #include "chrome/browser/extensions/external_extension_loader.h"
     10 
     11 #include "chrome/browser/prefs/pref_change_registrar.h"
     12 #include "content/common/notification_observer.h"
     13 #include "content/common/notification_registrar.h"
     14 
     15 class ListValue;
     16 class MockExternalPolicyExtensionProviderVisitor;
     17 class Profile;
     18 
     19 // A specialization of the ExternalExtensionProvider that uses
     20 // prefs::kExtensionInstallForceList to look up which external extensions are
     21 // registered.
     22 class ExternalPolicyExtensionLoader
     23     : public ExternalExtensionLoader,
     24       public NotificationObserver {
     25  public:
     26   explicit ExternalPolicyExtensionLoader(Profile* profile);
     27 
     28   // NotificationObserver implementation
     29   virtual void Observe(NotificationType type,
     30                        const NotificationSource& source,
     31                        const NotificationDetails& details);
     32 
     33  protected:
     34   virtual void StartLoading();
     35 
     36  private:
     37   friend class base::RefCountedThreadSafe<ExternalExtensionLoader>;
     38 
     39   virtual ~ExternalPolicyExtensionLoader() {}
     40 
     41   PrefChangeRegistrar pref_change_registrar_;
     42   NotificationRegistrar notification_registrar_;
     43 
     44   Profile* profile_;
     45 
     46   DISALLOW_COPY_AND_ASSIGN(ExternalPolicyExtensionLoader);
     47 };
     48 
     49 #endif  // CHROME_BROWSER_EXTENSIONS_EXTERNAL_POLICY_EXTENSION_LOADER_H_
     50