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

chrome/browser/bookmarks/base_bookmark_model_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_BOOKMARKS_BASE_BOOKMARK_MODEL_OBSERVER_H_
 #define CHROME_BROWSER_BOOKMARKS_BASE_BOOKMARK_MODEL_OBSERVER_H_
-#pragma once
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/bookmarks/bookmark_model_observer.h"
 
 // Base class for a BookmarkModelObserver implementation. All mutations of the
 // model funnel into the method BookmarkModelChanged.
 class BaseBookmarkModelObserver : public BookmarkModelObserver {
  public:
   BaseBookmarkModelObserver() {}
@@ skipping 23 matching lines @@
                                              const BookmarkNode* node) OVERRIDE;
 
  protected:
   virtual ~BaseBookmarkModelObserver() {}
 
  private:
   DISALLOW_COPY_AND_ASSIGN(BaseBookmarkModelObserver);
 };
 
 #endif  // CHROME_BROWSER_BOOKMARKS_BASE_BOOKMARK_MODEL_OBSERVER_H_