Don't animate the download shelf when entering/exiting fullscreen.

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/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 16 matching lines @@
   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.
   void ManagerGoingDown(content::DownloadManager* manager) override;
 
  protected:
   void DoAddDownload(content::DownloadItem* download) override;
-  void DoShow() override;
+  void DoOpen() override;
   void DoClose(CloseReason reason) override;
+  void DoHide() override;
+  void DoUnhide() override;
   base::TimeDelta GetTransientDownloadShowDelay() override;
   content::DownloadManager* GetDownloadManager() override;
 
  private:
   bool is_showing_;
   bool did_add_download_;
   content::DownloadManager* download_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(TestDownloadShelf);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_TEST_DOWNLOAD_SHELF_H_