Move handler processing to NotificationDisplayService

chrome/browser/extensions/api/notifications/extension_notification_handler.cc

 // Copyright 2017 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/extensions/api/notifications/extension_notification_handler.h"
 
 #include "base/logging.h"
 #include "base/strings/nullable_string16.h"
 #include "base/strings/string_piece.h"
 #include "chrome/browser/extensions/api/notifications/extension_notification_display_helper.h"
@@ skipping 27 matching lines @@
   args->AppendString(unscoped_notification_id);
   return args;
 }
 
 }  // namespace
 
 ExtensionNotificationHandler::ExtensionNotificationHandler() = default;
 
 ExtensionNotificationHandler::~ExtensionNotificationHandler() = default;
 
+void ExtensionNotificationHandler::OnShow(Profile* profile,
+                                          const std::string& notification_id) {}
+
 void ExtensionNotificationHandler::OnClose(Profile* profile,
                                            const std::string& origin,
                                            const std::string& notification_id,
                                            bool by_user) {
   EventRouter::UserGestureState gesture =
       by_user ? EventRouter::USER_GESTURE_ENABLED
               : EventRouter::USER_GESTURE_NOT_ENABLED;
   std::string extension_id(GetExtensionId(origin));
   DCHECK(!extension_id.empty());
 
@@ skipping 52 matching lines @@
   if (!event_router)
     return;
 
   std::unique_ptr<Event> event(
       new Event(histogram_value, event_name, std::move(args)));
   event->user_gesture = user_gesture;
   event_router->DispatchEventToExtension(extension_id, std::move(event));
 }
 
 }  // namespace extensions