src/chrome/browser/extensions/external_policy_loader.h

   1 // Copyright (c) 2012 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_LOADER_H_
   6 #define CHROME_BROWSER_EXTENSIONS_EXTERNAL_POLICY_LOADER_H_
   7
   8 #include <string>
   9
  10 #include "base/compiler_specific.h"
  11 #include "base/prefs/pref_change_registrar.h"
  12 #include "chrome/browser/extensions/external_loader.h"
  13 #include "content/public/browser/notification_observer.h"
  14 #include "content/public/browser/notification_registrar.h"
  15
  16 class Profile;
  17
  18 namespace base {
  19 class DictionaryValue;
  20 }
  21
  22 namespace extensions {
  23
  24 // A specialization of the ExternalProvider that uses
  25 // prefs::kExtensionInstallForceList to look up which external extensions are
  26 // registered.
  27 class ExternalPolicyLoader
  28     : public ExternalLoader,
  29       public content::NotificationObserver {
  30  public:
  31   explicit ExternalPolicyLoader(Profile* profile);
  32
  33   // content::NotificationObserver implementation
  34   virtual void Observe(int type,
  35                        const content::NotificationSource& source,
  36                        const content::NotificationDetails& details) OVERRIDE;
  37
  38   // Adds an extension to be updated to the pref dictionary.
  39   static void AddExtension(base::DictionaryValue* dict,
  40                            const std::string& extension_id,
  41                            const std::string& update_url);
  42
  43  protected:
  44   virtual void StartLoading() OVERRIDE;
  45
  46  private:
  47   friend class base::RefCountedThreadSafe<ExternalLoader>;
  48
  49   virtual ~ExternalPolicyLoader() {}
  50
  51   PrefChangeRegistrar pref_change_registrar_;
  52   content::NotificationRegistrar notification_registrar_;
  53
  54   Profile* profile_;
  55
  56   DISALLOW_COPY_AND_ASSIGN(ExternalPolicyLoader);
  57 };
  58
  59 }  // namespace extensions
  60
  61 #endif  // CHROME_BROWSER_EXTENSIONS_EXTERNAL_POLICY_LOADER_H_