Remove #pragma once from content

content/public/browser/user_metrics.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_USER_METRICS_H_
 #define CONTENT_PUBLIC_BROWSER_USER_METRICS_H_
-#pragma once
 
 #include <string>
 
 #include "content/common/content_export.h"
 
 namespace content {
 
 // This module provides some helper functions for logging actions tracked by
 // the user metrics system.
 
@@ skipping 29 matching lines @@
 // This function has identical input and behavior to RecordAction, but is
 // not automatically found by the action-processing scripts.  It can be used
 // when it's a pain to enumerate all possible actions, but if you use this
 // you need to also update the rules for extracting known actions in
 // chrome/tools/extract_actions.py.
 CONTENT_EXPORT void RecordComputedAction(const std::string& action);
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_USER_METRICS_H_