Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/api/proxy/proxy_api_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.
 
 // Constants for the Chrome Extensions Proxy Settings API.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_PROXY_PROXY_API_CONSTANTS_H_
 #define CHROME_BROWSER_EXTENSIONS_API_PROXY_PROXY_API_CONSTANTS_H_
-#pragma once
 
 namespace extensions {
 namespace proxy_api_constants {
 
 // String literals in dictionaries used to communicate with extension.
 extern const char kProxyConfigMode[];
 extern const char kProxyConfigPacScript[];
 extern const char kProxyConfigPacScriptMandatory[];
 extern const char kProxyConfigPacScriptUrl[];
 extern const char kProxyConfigPacScriptData[];
@@ skipping 29 matching lines @@
 
 // The names of the schemes to be used to build the preference value string
 // for manual proxy settings.  These must be kept in sync with the SCHEME_*
 // constants.
 extern const char* scheme_name[];
 
 }  // namespace proxy_api_constants
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_PROXY_PROXY_API_CONSTANTS_H_