Revert "Fix a ton of compiler warnings."

chrome/browser/page_info_model.h

 // Copyright (c) 2009 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_PAGE_INFO_MODEL_H_
 #define CHROME_BROWSER_PAGE_INFO_MODEL_H_
 
 #include <vector>
 
 #include "base/string16.h"
 #include "chrome/browser/cancelable_request.h"
 #include "chrome/browser/history/history.h"
 #include "chrome/browser/tab_contents/navigation_entry.h"
 #include "googleurl/src/gurl.h"
 
 class PrefService;
 class Profile;
 
 // The model that provides the information that should be displayed in the page
 // info dialog.
 class PageInfoModel {
  public:
   class PageInfoModelObserver {
     public:
      virtual void ModelChanged() = 0;
-    protected:
-     ~PageInfoModelObserver() {}
   };
 
   // Because the UI on the Mac is statically laid-out, this enum provides the
   // section type for the associated index. It is only used on Mac.
   // Ideally the view wouldn't have to know anything regarding the semantics of
   // the model and would only use GetSectionCount()/GetSectionInfo().
   enum SectionType {
     IDENTITY = 0,
     CONNECTION,
     HISTORY
@@ skipping 45 matching lines @@
 
   std::vector<SectionInfo> sections_;
 
   // Used to request number of visits.
   CancelableRequestConsumer request_consumer_;
 
   DISALLOW_COPY_AND_ASSIGN(PageInfoModel);
 };
 
 #endif  // CHROME_BROWSER_PAGE_INFO_MODEL_H_