Remove #pragma once from content

content/public/common/content_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.
 
 // A handful of resource-like constants related to the Content application.
 
 #ifndef CONTENT_PUBLIC_COMMON_CONTENT_CONSTANTS_H_
 #define CONTENT_PUBLIC_COMMON_CONTENT_CONSTANTS_H_
-#pragma once
 
 #include <stddef.h>         // For size_t
 
 #include "base/file_path.h"
 #include "content/common/content_export.h"
 
 namespace content {
 
 // The name of the directory under BrowserContext::GetPath where the AppCache is
 // put.
@@ skipping 23 matching lines @@
 CONTENT_EXPORT extern const size_t kMaxURLChars;
 CONTENT_EXPORT extern const size_t kMaxURLDisplayChars;
 
 extern const char kStatsFilename[];
 extern const int kStatsMaxThreads;
 extern const int kStatsMaxCounters;
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_CONSTANTS_H_