extensions/browser/api/storage/settings_observer.h

   1 // Copyright 2014 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 EXTENSIONS_BROWSER_API_STORAGE_SETTINGS_OBSERVER_H_
   6 #define EXTENSIONS_BROWSER_API_STORAGE_SETTINGS_OBSERVER_H_
   7
   8 #include "base/observer_list_threadsafe.h"
   9 #include "extensions/browser/api/storage/settings_namespace.h"
  10
  11 namespace extensions {
  12
  13 // Interface for classes that listen to changes to extension settings.
  14 class SettingsObserver {
  15  public:
  16   // Called when a list of settings have changed for an extension.
  17   virtual void OnSettingsChanged(
  18       const std::string& extension_id,
  19       settings_namespace::Namespace settings_namespace,
  20       const std::string& changes_json) = 0;
  21
  22   virtual ~SettingsObserver() {}
  23 };
  24
  25 typedef ObserverListThreadSafe<SettingsObserver>
  26     SettingsObserverList;
  27
  28 }  // namespace extensions
  29
  30 #endif  // EXTENSIONS_BROWSER_API_STORAGE_SETTINGS_OBSERVER_H_