Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/extension_tab_util.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_TAB_UTIL_H__
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_TAB_UTIL_H__
-#pragma once
 
 #include <string>
 
 class Browser;
 class GURL;
 class Profile;
 class TabContents;
 class TabStripModel;
 
 namespace base {
@@ skipping 53 matching lines @@
   // extension base, we decided it wasn't worth breaking existing extensions to
   // fix.
   static GURL ResolvePossiblyRelativeURL(const std::string& url_string,
       const extensions::Extension* extension);
 
   // Returns true if |url| is used for testing crashes.
   static bool IsCrashURL(const GURL& url);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_TAB_UTIL_H__