Remove #pragma once from content

content/public/common/url_constants.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_COMMON_URL_CONSTANTS_H_
 #define CONTENT_PUBLIC_COMMON_URL_CONSTANTS_H_
-#pragma once
 
 #include "content/common/content_export.h"
 
 // Contains constants for known URLs and portions thereof.
 
 // TODO(jam): rename this to content.
 namespace chrome {
 
 // Canonical schemes you can use as input to GURL.SchemeIs().
 // TODO(jam): some of these don't below in the content layer, but are accessed
@@ skipping 48 matching lines @@
 // Special URL used to swap out a view being rendered by another process.
 extern const char kSwappedOutURL[];
 
 // Null terminated list of schemes that are savable. This function can be
 // invoked on any thread.
 CONTENT_EXPORT const char* const* GetSavableSchemes();
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_URL_CONSTANTS_H_