Removed NOTIFICATION_BROWSER_CLOSING notification

chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.h

Index: chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.h
diff --git a/chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.h b/chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.h
index a800f2114f1760ff99b3598baf509856d7104e4d..0cb3ba1d61505dbbe16306b4dd01c73689519dff 100644
--- a/chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.h
+++ b/chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.h
@@ -6,10 +6,10 @@
 #define CHROME_BROWSER_UI_ASH_LAUNCHER_BROWSER_SHORTCUT_LAUNCHER_ITEM_CONTROLLER_H_
 
 #include "base/macros.h"
+#include "base/scoped_observer.h"
 #include "chrome/browser/ui/ash/launcher/launcher_item_controller.h"
 #include "chrome/browser/ui/browser_list.h"
-#include "content/public/browser/notification_observer.h"
-#include "content/public/browser/notification_registrar.h"
+#include "chrome/browser/ui/browser_list_observer.h"
 
 namespace ash {
 class ShelfModel;
@@ -25,7 +25,7 @@ class ChromeLauncherController;
 // This item shows an application menu that lists open browser windows or tabs.
 class BrowserShortcutLauncherItemController
     : public LauncherItemController,
-      public content::NotificationObserver {
+      public chrome::BrowserListObserver {
  public:
   BrowserShortcutLauncherItemController(ChromeLauncherController* controller,
                                         ash::ShelfModel* shelf_model);
@@ -64,18 +64,16 @@ class BrowserShortcutLauncherItemController
   // Get a list of active browsers.
   BrowserList::BrowserVector GetListOfActiveBrowsers();
 
-  // content::NotificationObserver:
-  void Observe(int type,
-               const content::NotificationSource& source,
-               const content::NotificationDetails& details) override;
+  // chrome::BrowserListObserver:
+  void OnBrowserCloseStarted(Browser* browser) override;
 
   ash::ShelfModel* shelf_model_;
 
   // The cached list of open browser windows shown in an application menu.
   BrowserList::BrowserVector browser_menu_items_;
 
-  // Registers for notifications of closing browser windows.
-  content::NotificationRegistrar registrar_;
+  // Observer for browser windows closing events.
+  ScopedObserver<BrowserList, BrowserListObserver> browser_list_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserShortcutLauncherItemController);
 };