Remove the OnError method from notification delegates.

content/child/notifications/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/child/notifications/notification_manager.h"
 
 #include "base/lazy_instance.h"
 #include "base/threading/thread_local.h"
 #include "content/child/notifications/notification_dispatcher.h"
 #include "content/child/thread_safe_sender.h"
@@ skipping 113 matching lines @@
   thread_safe_sender_->Send(new PlatformNotificationHostMsg_CheckPermission(
       GURL(origin.string()), &permission));
 
   return permission;
 }
 
 bool NotificationManager::OnMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(NotificationManager, message)
     IPC_MESSAGE_HANDLER(PlatformNotificationMsg_DidShow, OnShow);
-    IPC_MESSAGE_HANDLER(PlatformNotificationMsg_DidError, OnError);
     IPC_MESSAGE_HANDLER(PlatformNotificationMsg_DidClose, OnClose);
     IPC_MESSAGE_HANDLER(PlatformNotificationMsg_DidClick, OnClick);
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   return handled;
 }
 
 void NotificationManager::OnShow(int id) {
   const auto& iter = active_notifications_.find(id);
   if (iter == active_notifications_.end())
     return;
 
   iter->second->dispatchShowEvent();
 }
 
-void NotificationManager::OnError(int id) {
-  const auto& iter = active_notifications_.find(id);
-  if (iter == active_notifications_.end())
-    return;
-
-  iter->second->dispatchErrorEvent();
-}
-
 void NotificationManager::OnClose(int id) {
   const auto& iter = active_notifications_.find(id);
   if (iter == active_notifications_.end())
     return;
 
   iter->second->dispatchCloseEvent();
   active_notifications_.erase(iter);
 }
 
 void NotificationManager::OnClick(int id) {
   const auto& iter = active_notifications_.find(id);
   if (iter == active_notifications_.end())
     return;
 
   iter->second->dispatchClickEvent();
 }
 
 }  // namespace content