Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/extension_record_api.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_RECORD_API_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_RECORD_API_H_
-#pragma once
 
 #include "chrome/browser/extensions/extension_function.h"
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/time.h"
 
 namespace {
 
 const FilePath::CharType kURLErrorsSuffix[] = FILE_PATH_LITERAL(".errors");
 const char kErrorsKey[] = "errors";
@@ skipping 135 matching lines @@
 
   // This time datum marks the start and end of the sub-browser run.
   base::Time timer_;
 
   // These two data are additional information returned to caller.
   int run_time_ms_;
   std::string stats_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_RECORD_API_H_