Move handler processing to NotificationDisplayService.

chrome/browser/notifications/persistent_notification_handler.cc

 // Copyright 2016 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/persistent_notification_handler.h"
 
 #include "base/logging.h"
 #include "chrome/browser/notifications/platform_notification_service_impl.h"
 #include "chrome/browser/profiles/profile.h"
 
 PersistentNotificationHandler::PersistentNotificationHandler() {}
 PersistentNotificationHandler::~PersistentNotificationHandler() {}
 
+void PersistentNotificationHandler::OnShow(Profile* profile,
+                                           const std::string& notification_id) {
+}
+
 void PersistentNotificationHandler::OnClose(Profile* profile,
                                             const std::string& origin,
                                             const std::string& notification_id,
                                             bool by_user) {
   if (!by_user)
     return;  // no need to propagate back programmatic close events
 
   const GURL notification_origin(origin);
   DCHECK(notification_origin.is_valid());
 
@@ skipping 10 matching lines @@
   const GURL notification_origin(origin);
   DCHECK(notification_origin.is_valid());
 
   PlatformNotificationServiceImpl::GetInstance()->OnPersistentNotificationClick(
       profile, notification_id, notification_origin, action_index, reply);
 }
 
 void PersistentNotificationHandler::OpenSettings(Profile* profile) {
   NotificationCommon::OpenNotificationSettings(profile);
 }