Update the windows UI to support displaying a warning after the

chrome/browser/ui/views/download/download_item_view.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.
 //
 // A ChromeView that implements one download on the Download shelf.
 // Each DownloadItemView contains an application icon, a text label
 // indicating the download's file name, a text label indicating the
 // download's status (such as the number of bytes downloaded so far)
 // and a button for canceling an in progress download, or opening
 // the completed download.
@@ skipping 140 matching lines @@
 
   // Sets the state and triggers a repaint.
   void SetState(State body_state, State drop_down_state);
 
   // Whether we are in the dangerous mode.
   bool IsDangerousMode() { return body_state_ == DANGEROUS; }
 
   // Reverts from dangerous mode to normal download mode.
   void ClearDangerousMode();
 
+  // Start displaying the dangerous download warning.
+  void EnterDangerousMode();
+
   // Sets |size| with the size of the Save and Discard buttons (they have the
   // same size).
   gfx::Size GetButtonSize();
 
   // Sizes the dangerous download label to a minimum width available using 2
   // lines.  The size is computed only the first time this method is invoked
   // and simply returned on subsequent calls.
   void SizeLabelToMinWidth();
 
   // Reenables the item after it has been disabled when a user clicked it to
@@ skipping 114 matching lines @@
 
   // The icon loaded in the download shelf is based on the file path of the
   // item.  Store the path used, so that we can detect a change in the path
   // and reload the icon.
   FilePath last_download_item_path_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_DOWNLOAD_DOWNLOAD_ITEM_VIEW_H__