Use DownloadManager::Observer in TestDownloadShelf

chrome/browser/download/test_download_shelf.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_DOWNLOAD_TEST_DOWNLOAD_SHELF_H_
 #define CHROME_BROWSER_DOWNLOAD_TEST_DOWNLOAD_SHELF_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "chrome/browser/download/download_shelf.h"
-
-namespace content {
-class DownloadManager;
-}
+#include "content/public/browser/download_manager.h"
 
 // An implementation of DownloadShelf for testing.
-class TestDownloadShelf : public DownloadShelf {
+class TestDownloadShelf : public DownloadShelf,
+                          public content::DownloadManager::Observer {
  public:
   TestDownloadShelf();
   virtual ~TestDownloadShelf();
 
   // DownloadShelf:
   virtual bool IsShowing() const OVERRIDE;
   virtual bool IsClosing() const OVERRIDE;
   virtual Browser* browser() const OVERRIDE;
 
   // Return |true| if a download was added to this shelf.
   bool did_add_download() const { return did_add_download_; }
 
   // Set download_manager_ (and the result of calling GetDownloadManager())
   void set_download_manager(content::DownloadManager* download_manager);
 
+  // DownloadManager::Observer implementation.
+  virtual void ManagerGoingDown(content::DownloadManager* manager) OVERRIDE;
+
  protected:
   virtual void DoAddDownload(content::DownloadItem* download) OVERRIDE;
   virtual void DoShow() OVERRIDE;
   virtual void DoClose(CloseReason reason) OVERRIDE;
   virtual base::TimeDelta GetTransientDownloadShowDelay() OVERRIDE;
   virtual content::DownloadManager* GetDownloadManager() OVERRIDE;
 
  private:
   bool is_showing_;
   bool did_add_download_;
-  scoped_refptr<content::DownloadManager> download_manager_;
+  content::DownloadManager* download_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(TestDownloadShelf);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_TEST_DOWNLOAD_SHELF_H_