Remove InstallTracker's extension load, unload observer

chrome/browser/ui/app_list/extension_app_model_builder.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_UI_APP_LIST_EXTENSION_APP_MODEL_BUILDER_H_
 #define CHROME_BROWSER_UI_APP_LIST_EXTENSION_APP_MODEL_BUILDER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/prefs/pref_change_registrar.h"
+#include "base/scoped_observer.h"
 #include "chrome/browser/extensions/install_observer.h"
+#include "extensions/browser/extension_registry_observer.h"
 #include "ui/app_list/app_list_model.h"
 #include "ui/base/models/list_model_observer.h"
 
 class AppListControllerDelegate;
 class ExtensionAppItem;
 class Profile;
 
 namespace app_list {
 class AppListSyncableService;
 }
 
 namespace extensions {
 class Extension;
+class ExtensionRegistry;
 class ExtensionSet;
 class InstallTracker;
 }
 
 namespace gfx {
 class ImageSkia;
 }
 
 // This class populates and maintains the given |model| with information from
 // |profile|.
 class ExtensionAppModelBuilder : public extensions::InstallObserver,
+                                 public extensions::ExtensionRegistryObserver,
                                  public app_list::AppListItemListObserver {
  public:
   explicit ExtensionAppModelBuilder(AppListControllerDelegate* controller);
   virtual ~ExtensionAppModelBuilder();
 
   // Initialize to use app-list sync and sets |service_| to |service|.
   void InitializeWithService(app_list::AppListSyncableService* service);
 
   // Initialize to use extension sync and sets |service_| to NULL. Used in
   // tests and when AppList sync is not enabled.
   void InitializeWithProfile(Profile* profile, app_list::AppListModel* model);
 
  private:
   typedef std::vector<ExtensionAppItem*> ExtensionAppList;
 
   // Builds the model with the current profile.
   void BuildModel();
 
-  // extensions::InstallObserver
+  // extensions::InstallObserver.
   virtual void OnBeginExtensionInstall(
       const ExtensionInstallParams& params) OVERRIDE;
   virtual void OnDownloadProgress(const std::string& extension_id,
                                   int percent_downloaded) OVERRIDE;
   virtual void OnInstallFailure(const std::string& extension_id) OVERRIDE;
-  virtual void OnExtensionLoaded(
-      const extensions::Extension* extension) OVERRIDE;
-  virtual void OnExtensionUnloaded(
-      const extensions::Extension* extension) OVERRIDE;
-  virtual void OnExtensionUninstalled(
-      const extensions::Extension* extension) OVERRIDE;
   virtual void OnDisabledExtensionUpdated(
       const extensions::Extension* extension) OVERRIDE;
   virtual void OnAppInstalledToAppList(
       const std::string& extension_id) OVERRIDE;
   virtual void OnShutdown() OVERRIDE;
 
-  // AppListItemListObserver
+  // extensions::ExtensionRegistryObserver.
+  virtual void OnExtensionLoaded(
+      content::BrowserContext* browser_context,
+      const extensions::Extension* extension) OVERRIDE;
+  virtual void OnExtensionUnloaded(
+      content::BrowserContext* browser_context,
+      const extensions::Extension* extension,
+      extensions::UnloadedExtensionInfo::Reason reason) OVERRIDE;
+  virtual void OnExtensionUninstalled(
+      content::BrowserContext* browser_context,
+      const extensions::Extension* extension) OVERRIDE;
+  virtual void OnShutdown(extensions::ExtensionRegistry* registry) OVERRIDE;
+
+  // AppListItemListObserver.
   virtual void OnListItemMoved(size_t from_index,
                                size_t to_index,
                                app_list::AppListItem* item) OVERRIDE;
 
   scoped_ptr<ExtensionAppItem> CreateAppItem(
       const std::string& extension_id,
       const std::string& extension_name,
       const gfx::ImageSkia& installing_icon,
       bool is_platform_app);
 
@@ skipping 42 matching lines @@
 
   std::string highlight_app_id_;
 
   // True if we haven't set |highlight_app_id_| to be highlighted. This happens
   // if we try to highlight an app that doesn't exist in the list yet.
   bool highlighted_app_pending_;
 
   // We listen to this to show app installing progress.
   extensions::InstallTracker* tracker_;
 
+  // Listen extension's load, unload, uninstalled.
+  extensions::ExtensionRegistry* extension_registry_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionAppModelBuilder);
 };
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_EXTENSION_APP_MODEL_BUILDER_H_