extensions/browser/extension_registry_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_EXTENSION_REGISTRY_OBSERVER_H_
   6 #define EXTENSIONS_BROWSER_EXTENSION_REGISTRY_OBSERVER_H_
   7
   8 namespace content {
   9 class BrowserContext;
  10 }
  11
  12 namespace extensions {
  13
  14 class Extension;
  15
  16 // Observer for ExtensionRegistry. Exists in a separate header file to reduce
  17 // the include file burden for typical clients of ExtensionRegistry.
  18 class ExtensionRegistryObserver {
  19  public:
  20   virtual ~ExtensionRegistryObserver() {}
  21
  22   // Called after an extension is loaded. The extension will exclusively exist
  23   // in the enabled_extensions set of ExtensionRegistry.
  24   virtual void OnExtensionLoaded(
  25       content::BrowserContext* browser_context,
  26       const Extension* extension) {}
  27
  28   // Called after an extension is unloaded. The extension no longer exists in
  29   // any of the ExtensionRegistry sets (enabled, disabled, etc.).
  30   virtual void OnExtensionUnloaded(
  31       content::BrowserContext* browser_context,
  32       const Extension* extension) {}
  33 };
  34
  35 }  // namespace extensions
  36
  37 #endif  // EXTENSIONS_BROWSER_EXTENSION_REGISTRY_OBSERVER_H_