Create a very simple TabContentsView (and not fully implemented yet) and add more supporting code...

content/browser/download/download_manager_delegate.h

 // Copyright (c) 2011 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_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_DELEGATE_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_DELEGATE_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time.h"
 
 class DownloadItem;
 class FilePath;
 class TabContents;
 class SavePackage;
 
 // Browser's download manager: manages all downloads and destination view.
 class DownloadManagerDelegate {
  public:
+  virtual ~DownloadManagerDelegate() {}
+
   // Lets the delegate know that the download manager is shutting down.
   virtual void Shutdown() = 0;
 
   // 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) = 0;
 
   // Asks the user for the path for a download. The delegate calls
   // DownloadManager::FileSelected or DownloadManager::FileSelectionCanceled to
@@ skipping 62 matching lines @@
   // SavePackage::OnPathPicked to give the answer.
   virtual void ChooseSavePath(const base::WeakPtr<SavePackage>& save_package,
                               const FilePath& suggested_path,
                               bool can_save_as_complete) = 0;
 
   // Informs the delegate that the progress of downloads has changed.
   virtual void DownloadProgressUpdated() = 0;
 
  protected:
   DownloadManagerDelegate() {}
-  virtual ~DownloadManagerDelegate() {}
 
   DISALLOW_COPY_AND_ASSIGN(DownloadManagerDelegate);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_DELEGATE_H_