Remove InstallTracker's extension load, unload observer

chrome/browser/ui/app_list/search/app_result.h

 // Copyright 2013 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_SEARCH_APP_RESULT_H_
 #define CHROME_BROWSER_UI_APP_LIST_SEARCH_APP_RESULT_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
+#include "base/scoped_observer.h"
 #include "chrome/browser/extensions/extension_icon_image.h"
-#include "chrome/browser/extensions/install_observer.h"
 #include "chrome/browser/ui/app_list/app_context_menu_delegate.h"
 #include "chrome/browser/ui/app_list/search/chrome_search_result.h"
 #include "chrome/browser/ui/extensions/extension_enable_flow_delegate.h"
+#include "extensions/browser/extension_registry_observer.h"
 
 class AppListControllerDelegate;
 class ExtensionEnableFlow;
 class Profile;
 
 namespace extensions {
-class InstallTracker;
+class ExtensionRegistry;
 }
 
 namespace app_list {
 
 class AppContextMenu;
 class TokenizedString;
 class TokenizedStringMatch;
 
 class AppResult : public ChromeSearchResult,
                   public extensions::IconImage::Observer,
                   public AppContextMenuDelegate,
                   public ExtensionEnableFlowDelegate,
-                  public extensions::InstallObserver {
+                  public extensions::ExtensionRegistryObserver {
  public:
   AppResult(Profile* profile,
             const std::string& app_id,
             AppListControllerDelegate* controller);
   virtual ~AppResult();
 
   void UpdateFromMatch(const TokenizedString& title,
                        const TokenizedStringMatch& match);
 
   // ChromeSearchResult overides:
   virtual void Open(int event_flags) OVERRIDE;
   virtual void InvokeAction(int action_index, int event_flags) OVERRIDE;
   virtual scoped_ptr<ChromeSearchResult> Duplicate() OVERRIDE;
   virtual ui::MenuModel* GetContextMenuModel() OVERRIDE;
   virtual ChromeSearchResultType GetType() OVERRIDE;
 
  private:
-  void StartObservingInstall();
-  void StopObservingInstall();
-
   // Checks if extension is disabled and if enable flow should be started.
   // Returns true if extension enable flow is started or there is already one
   // running.
   bool RunExtensionEnableFlow();
 
   // Updates the app item's icon, if necessary making it gray.
   void UpdateIcon();
 
   // extensions::IconImage::Observer overrides:
   virtual void OnExtensionIconImageChanged(
       extensions::IconImage* image) OVERRIDE;
 
   // AppContextMenuDelegate overrides:
   virtual void ExecuteLaunchCommand(int event_flags) OVERRIDE;
 
   // ExtensionEnableFlowDelegate overrides:
   virtual void ExtensionEnableFlowFinished() OVERRIDE;
   virtual void ExtensionEnableFlowAborted(bool user_initiated) OVERRIDE;
 
-  // extensions::InstallObserver overrides:
+  // extensions::ExtensionRegistryObserver override:
   virtual void OnExtensionLoaded(
+      content::BrowserContext* browser_context,
       const extensions::Extension* extension) OVERRIDE;
   virtual void OnExtensionUninstalled(
+      content::BrowserContext* browser_context,
       const extensions::Extension* extension) OVERRIDE;
-  virtual void OnShutdown() OVERRIDE;
 
   Profile* profile_;
   const std::string app_id_;
   AppListControllerDelegate* controller_;
 
+  ScopedObserver<extensions::ExtensionRegistry,
+                 extensions::ExtensionRegistryObserver>
+      extension_registry_observer_;
+
   bool is_platform_app_;
   scoped_ptr<extensions::IconImage> icon_;
   scoped_ptr<AppContextMenu> context_menu_;
   scoped_ptr<ExtensionEnableFlow> extension_enable_flow_;
 
-  extensions::InstallTracker* install_tracker_;  // Not owned.
-
   DISALLOW_COPY_AND_ASSIGN(AppResult);
 };
 
 }  // namespace app_list
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_SEARCH_APP_RESULT_H_