Mountain Lion: use the system download progress.

chrome/browser/download/download_completion_observer_win.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_COMPLETION_OBSERVER_WIN_H_
-#define CHROME_BROWSER_DOWNLOAD_COMPLETION_OBSERVER_WIN_H_
-
-#include <set>
-
-#include "base/basictypes.h"
-#include "content/public/browser/download_item.h"
-#include "content/public/browser/download_manager.h"
-
-// Tracks download item completions and notifies any interested parties
-// (Windows 8 metro) about the same. On Windows 8 we display metro style
-// notifications when a download completes.
-class DownloadCompletionObserver
-    : public content::DownloadManager::Observer,
-      public content::DownloadItem::Observer {
- public:
-  explicit DownloadCompletionObserver(content::DownloadManager* manager);
-  ~DownloadCompletionObserver();
-
-  // Methods inherited from content::DownloadManager::Observer.
-  virtual void OnDownloadCreated(
-      content::DownloadManager* manager, content::DownloadItem* download)
-      OVERRIDE;
-  virtual void ManagerGoingDown(content::DownloadManager* manager) OVERRIDE;
-
-  // Methods inherited from content::DownloadItem::Observer.
-  virtual void OnDownloadUpdated(content::DownloadItem* download) OVERRIDE;
-  virtual void OnDownloadOpened(content::DownloadItem* download) OVERRIDE {}
-
- private:
-  void ClearDownloadItems();
-
-  std::set<content::DownloadItem*> download_items_;
-
-  DISALLOW_COPY_AND_ASSIGN(DownloadCompletionObserver);
-};
-
-#endif  // CHROME_BROWSER_DOWNLOAD_COMPLETION_OBSERVER_WIN_H_