Update the windows UI to support displaying a warning after the

chrome/browser/ui/views/download/download_item_view.h

Index: chrome/browser/ui/views/download/download_item_view.h
===================================================================
--- chrome/browser/ui/views/download/download_item_view.h	(revision 110657)
+++ chrome/browser/ui/views/download/download_item_view.h	(working copy)
@@ -158,6 +158,9 @@
   // 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();