Remove #pragma once from chrome/browser/{printing,safe_browsing,prefs,bookmarks,autocomplete}

chrome/browser/printing/print_preview_context_menu_observer.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_PRINTING_PRINT_PREVIEW_CONTEXT_MENU_OBSERVER_H_
 #define CHROME_BROWSER_PRINTING_PRINT_PREVIEW_CONTEXT_MENU_OBSERVER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/tab_contents/render_view_context_menu_observer.h"
 
 class TabContents;
 
 class PrintPreviewContextMenuObserver : public RenderViewContextMenuObserver {
  public:
   explicit PrintPreviewContextMenuObserver(TabContents* tab);
   virtual ~PrintPreviewContextMenuObserver();
 
   // RenderViewContextMenuObserver implementation.
   virtual bool IsCommandIdSupported(int command_id) OVERRIDE;
   virtual bool IsCommandIdEnabled(int command_id) OVERRIDE;
 
  private:
   bool IsPrintPreviewTab();
 
   TabContents* tab_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewContextMenuObserver);
 };
 
 #endif  // CHROME_BROWSER_PRINTING_PRINT_PREVIEW_CONTEXT_MENU_OBSERVER_H_