Remove #pragma once from chrome/browser/extensions

chrome/browser/extensions/extension_event_router.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_EVENT_ROUTER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_EVENT_ROUTER_H_
-#pragma once
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/values.h"
 #include "chrome/browser/extensions/event_listener_map.h"
@@ skipping 269 matching lines @@
                  const GURL& event_url,
                  Profile* restrict_to_profile,
                  ExtensionEventRouter::UserGestureState user_gesture,
                  const extensions::EventFilteringInfo& info);
 
   ~ExtensionEvent();
 };
 
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_EVENT_ROUTER_H_