Remove #pragma once from content

content/public/browser/navigation_type.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_PUBLIC_BROWSER_NAVIGATION_TYPE_H_
 #define CONTENT_PUBLIC_BROWSER_NAVIGATION_TYPE_H_
-#pragma once
 
 namespace content {
 
 // Indicates different types of navigations that can occur that we will handle
 // separately.
 enum NavigationType {
   // Unknown type.
   NAVIGATION_TYPE_UNKNOWN,
 
   // A new page was navigated in the main frame.
@@ skipping 33 matching lines @@
 
   // Nothing happened. This happens when we get information about a page we
   // don't know anything about. It can also happen when an iframe in a popup
   // navigated to about:blank is navigated. Nothing needs to be done.
   NAVIGATION_TYPE_NAV_IGNORE,
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_NAVIGATION_TYPE_H_