Remove #pragma once from content

content/public/browser/invalidate_type.h

 // Copyright (c) 2012 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_INVALIDATE_TYPE_H_
 #define CONTENT_PUBLIC_BROWSER_INVALIDATE_TYPE_H_
-#pragma once
 
 namespace content {
 
 // Flags passed to the WebContentsDelegate.NavigationStateChanged to tell it
 // what has changed. Combine them to update more than one thing.
 enum InvalidateTypes {
   INVALIDATE_TYPE_URL           = 1 << 0,  // The URL has changed.
   INVALIDATE_TYPE_TAB           = 1 << 1,  // The favicon, app icon, or crashed
                                            // state changed.
   INVALIDATE_TYPE_LOAD          = 1 << 2,  // The loading state has changed.
   INVALIDATE_TYPE_PAGE_ACTIONS  = 1 << 3,  // Page action icons have changed.
   INVALIDATE_TYPE_TITLE         = 1 << 4,  // The title changed.
 };
 
 }
 
 #endif  // CONTENT_PUBLIC_BROWSER_INVALIDATE_TYPE_H_