Reduce number of unnamed-type-template-args violations.

content/common/content_notification_types.h

 // Copyright (c) 2011 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.
 
 #ifndef CONTENT_COMMON_NOTIFICATION_TYPE_H_
 #define CONTENT_COMMON_NOTIFICATION_TYPE_H_
 #pragma once
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
 //
 namespace content {
 
-enum {
+enum NotificationType {
   NOTIFICATION_CONTENT_START = 0,
 
   // General -----------------------------------------------------------------
 
   // Special signal value to represent an interest in all notifications.
   // Not valid when posting a notification.
   NOTIFICATION_ALL = NOTIFICATION_CONTENT_START,
 
   // The app is done processing user actions, now is a good time to do
   // some background work.
@@ skipping 420 matching lines @@
   // of a temporary zoom level change, the details is an empty string.
   NOTIFICATION_ZOOM_LEVEL_CHANGED,
 
   // Custom notifications used by the embedder should start from here.
   NOTIFICATION_CONTENT_END,
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_NOTIFICATION_TYPE_H_