RefCounted types should not have public destructors, delegate cleanup

content/public/browser/download_manager_delegate.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 CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/callback.h"
@@ skipping 18 matching lines @@
 // in response to this operation, the SavePackageDownloadCreatedCallback will be
 // non-null.
 typedef base::Callback<void(const FilePath&,
                             content::SavePageType,
                             const SavePackageDownloadCreatedCallback&)>
     SavePackagePathPickedCallback;
 
 // Browser's download manager: manages all downloads and destination view.
 class CONTENT_EXPORT DownloadManagerDelegate {
  public:
-  virtual ~DownloadManagerDelegate();
-
   // Lets the delegate know that the download manager is shutting down.
   virtual void Shutdown() {}
 
   // Returns a new DownloadId.
   virtual DownloadId GetNextId();
 
   // Notifies the delegate that a download is starting. The delegate can return
   // false to delay the start of the download, in which case it should call
   // DownloadManager::RestartDownload when it's ready.
   virtual bool ShouldStartDownload(int32 download_id);
@@ skipping 72 matching lines @@
                           FilePath* download_save_dir) {}
 
   // Asks the user for the path to save a page. The delegate calls the callback
   // to give the answer.
   virtual void ChooseSavePath(WebContents* web_contents,
                               const FilePath& suggested_path,
                               const FilePath::StringType& default_extension,
                               bool can_save_as_complete,
                               const SavePackagePathPickedCallback& callback) {
   }
+
+ protected:
+  virtual ~DownloadManagerDelegate();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_DELEGATE_H_