Revert of "Call the Close() event on a Notification when it's being replaced."

chrome/browser/notifications/message_center_notification_manager.cc

 // 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.
 
 #include "chrome/browser/notifications/message_center_notification_manager.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
@@ skipping 148 matching lines @@
   for (NotificationMap::iterator iter = profile_notifications_.begin();
        iter != profile_notifications_.end(); ++iter) {
     ProfileNotification* old_notification = (*iter).second;
     if (old_notification->notification().replace_id() == replace_id &&
         old_notification->notification().origin_url() == origin_url &&
         old_notification->profile() == profile) {
       // Changing the type from non-progress to progress does not count towards
       // the immediate update allowed in the message center.
       std::string old_id = old_notification->notification().id();
 
-      // The W3C Web Notifications specification states that replacing a
-      // notification should fire the "close" event on the old one. The WHATWG
-      // version does not include the "close" event at all anymore, so this
-      // will eventually become redundant.
-      // TODO(peter): Remove this call when removing the Close() event from
-      // Web Notifications. See http://crbug.com/437286.
-      old_notification->notification().delegate()->Close(false /* by_user */);
-
       // Add/remove notification in the local list but just update the same
       // one in MessageCenter.
       delete old_notification;
       profile_notifications_.erase(old_id);
       ProfileNotification* new_notification =
           new ProfileNotification(profile, notification);
       profile_notifications_[new_notification->notification().id()] =
           new_notification;
 
       // TODO(liyanhou): Add routing updated notifications to alternative
@@ skipping 226 matching lines @@
        it != registry->enabled_extensions().end();
        ++it) {
     if ((*it->get()).permissions_data()->HasAPIPermission(
             extensions::APIPermission::ID::kNotificationProvider)) {
       extension_id = (*it->get()).id();
       return extension_id;
     }
   }
   return extension_id;
 }