Move download stuff to download tab helper.

chrome/browser/tab_contents/tab_util.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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 CHROME_BROWSER_TAB_CONTENTS_TAB_UTIL_H_
 #define CHROME_BROWSER_TAB_CONTENTS_TAB_UTIL_H_
 #pragma once
 
 class TabContents;
+class TabContentsWrapper;
 
 namespace tab_util {
 
 // Helper to find the TabContents that originated the given request. Can be
 // NULL if the tab has been closed or some other error occurs.
-// Should only be called from the UI thread, since it accesses TabContent.
+// Should only be called from the UI thread, since it accesses TabContents.
 TabContents* GetTabContentsByID(int render_process_host_id, int routing_id);
 
+// Helper to find the TabContentsWrapper that originated the given request. Can
+// be NULL if the tab has been closed or some other error occurs. Should only
+// be called from the UI thread, since it accesses TabContents.
+TabContentsWrapper* GetTabContentsWrapperByID(int render_process_host_id,
+                                              int routing_id);
+
 }  // namespace tab_util
 
 #endif  // CHROME_BROWSER_TAB_CONTENTS_TAB_UTIL_H_