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 "chrome/browser/extensions/extension_management.h"
  12 #include "chrome/browser/extensions/external_loader.h"
  13
  14 namespace base {
  15 class DictionaryValue;
  16 }
  17
  18 namespace extensions {
  19
  20 // A specialization of the ExternalProvider that uses extension management
  21 // policies to look up which external extensions are registered.
  22 class ExternalPolicyLoader : public ExternalLoader,
  23                              public ExtensionManagement::Observer {
  24  public:
  25   explicit ExternalPolicyLoader(ExtensionManagement* settings);
  26
  27   // ExtensionManagement::Observer implementation
  28   virtual void OnExtensionManagementSettingsChanged() OVERRIDE;
  29
  30   // Adds an extension to be updated to the pref dictionary.
  31   static void AddExtension(base::DictionaryValue* dict,
  32                            const std::string& extension_id,
  33                            const std::string& update_url);
  34
  35  protected:
  36   virtual void StartLoading() OVERRIDE;
  37
  38  private:
  39   friend class base::RefCountedThreadSafe<ExternalLoader>;
  40
  41   virtual ~ExternalPolicyLoader();
  42
  43   ExtensionManagement* settings_;
  44
  45   DISALLOW_COPY_AND_ASSIGN(ExternalPolicyLoader);
  46 };
  47
  48 }  // namespace extensions
  49
  50 #endif  // CHROME_BROWSER_EXTENSIONS_EXTERNAL_POLICY_LOADER_H_