Remove the OnError method from notification delegates.

chrome/browser/chromeos/file_system_provider/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 "chrome/browser/chromeos/file_system_provider/notification_manager.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/app_icon_loader_impl.h"
 #include "chrome/grit/generated_resources.h"
@@ skipping 20 matching lines @@
   explicit ProviderNotificationDelegate(
       NotificationManager* notification_manager)
       : notification_manager_(notification_manager) {}
 
   virtual void ButtonClick(int button_index) override {
     notification_manager_->OnButtonClick(button_index);
   }
 
   virtual void Display() override {}
 
-  virtual void Error() override { notification_manager_->OnError(); }
-
   virtual void Close(bool by_user) override {
     notification_manager_->OnClose();
   }
 
   virtual void Click() override {}
 
  private:
   virtual ~ProviderNotificationDelegate() {}
   NotificationManager* notification_manager_;  // Not owned.
 
@@ skipping 41 matching lines @@
   }
 
   g_browser_process->message_center()->RemoveNotification(
       file_system_info_.mount_path().value(), false /* by_user */);
 }
 
 void NotificationManager::OnButtonClick(int button_index) {
   OnNotificationResult(ABORT);
 }
 
-void NotificationManager::OnError() {
-  OnNotificationResult(CONTINUE);
-}
-
 void NotificationManager::OnClose() {
   OnNotificationResult(CONTINUE);
 }
 
 void NotificationManager::SetAppImage(const std::string& id,
                                       const gfx::ImageSkia& image) {
   extension_icon_.reset(new gfx::Image(image));
   g_browser_process->message_center()->UpdateNotification(
       file_system_info_.mount_path().value(), CreateNotification());
 }
@@ skipping 34 matching lines @@
   while (it != callbacks_.end()) {
     CallbackMap::iterator current_it = it++;
     NotificationCallback callback = current_it->second;
     callbacks_.erase(current_it);
     callback.Run(result);
   }
 }
 
 }  // namespace file_system_provider
 }  // namespace chromeos