[CleanUp] Remove parameter |by_user| in NotificationClosed

content/shell/browser/layout_test/layout_test_notification_manager.cc

 // Copyright 2014 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 "content/shell/browser/layout_test/layout_test_notification_manager.h"
 
 #include "base/guid.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/desktop_notification_delegate.h"
@@ skipping 162 matching lines @@
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   return CheckPermission(origin);
 }
 
 void LayoutTestNotificationManager::Close(const std::string& title) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   auto iterator = page_notifications_.find(title);
   if (iterator == page_notifications_.end())
     return;
 
-  iterator->second->NotificationClosed(false);
+  iterator->second->NotificationClosed();
 }
 
 void LayoutTestNotificationManager::ReplaceNotificationIfNeeded(
     const PlatformNotificationData& notification_data) {
   if (!notification_data.tag.length())
     return;
 
   std::string tag = notification_data.tag;
   const auto& replace_iter = replacements_.find(tag);
   if (replace_iter != replacements_.end()) {
     const std::string& previous_title = replace_iter->second;
 
     const auto& page_notification_iter =
         page_notifications_.find(previous_title);
     if (page_notification_iter != page_notifications_.end()) {
       DesktopNotificationDelegate* previous_delegate =
           page_notification_iter->second;
 
-      previous_delegate->NotificationClosed(false);
+      previous_delegate->NotificationClosed();
 
       page_notifications_.erase(page_notification_iter);
       delete previous_delegate;
     }
 
     const auto& persistent_notification_iter =
         persistent_notifications_.find(previous_title);
     if (persistent_notification_iter != persistent_notifications_.end())
       persistent_notifications_.erase(persistent_notification_iter);
   }
 
   replacements_[tag] = base::UTF16ToUTF8(notification_data.title);
 }
 
 }  // namespace content