content: Remove unnecessary content:: from Notification classes.

content/public/browser/notification_types.h

Index: content/public/browser/notification_types.h
diff --git a/content/public/browser/notification_types.h b/content/public/browser/notification_types.h
index 1d6e50352e035801e37aeb684a2c665afd99cb62..67549aa184b79cb82c71a827043996c8fad1cc6c 100644
--- a/content/public/browser/notification_types.h
+++ b/content/public/browser/notification_types.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPE_H_
-#define CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPE_H_
+#ifndef CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_
+#define CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_
 #pragma once
 
 // This file describes various types used to describe and filter notifications
@@ -443,4 +443,4 @@ enum NotificationType {
 
 }  // namespace content
 
-#endif  // CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPE_H_
+#endif  // CONTENT_PUBLIC_BROWSER_NOTIFICATION_TYPES_H_