Always do DelegateExecute handler COM registration and make set dual mode prop on shortcuts.

base/file_util_win.cc

 // 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.
 
 #include "base/file_util.h"
 
 #include <windows.h>
 #include <propvarutil.h>
 #include <psapi.h>
 #include <shellapi.h>
@@ skipping 398 matching lines @@
     return false;
 
   if (description && FAILED(i_shell_link->SetDescription(description)))
     return false;
 
   if (icon && FAILED(i_shell_link->SetIconLocation(icon, icon_index)))
     return false;
 
   bool is_dual_mode = (options & SHORTCUT_DUAL_MODE) != 0;
   if ((app_id || is_dual_mode) &&
       base::win::GetVersion() >= base::win::VERSION_WIN7) {

[gab, 2012/05/16 17:04:22]

You probably also want to get rid of this to support Vista/XP --> Win8.

[grt (UTC plus 2), 2012/05/16 17:16:16]

Excellent point.  I've changed it to >= VERSION_VISTA since IPropertyStore
didn't exist in XP.

     base::win::ScopedComPtr<IPropertyStore> property_store;
     if (FAILED(property_store.QueryFrom(i_shell_link)) || !property_store.get())
       return false;
 
     if (app_id && !base::win::SetAppIdForPropertyStore(property_store, app_id))
       return false;
     if (is_dual_mode &&
-        base::win::GetVersion() >= base::win::VERSION_WIN8 &&
         !base::win::SetDualModeForPropertyStore(property_store)) {
       return false;
     }
   }
 
   HRESULT result = i_persist_file->Save(destination, TRUE);
 
   // If we successfully updated the icon, notify the shell that we have done so.
   if (!create && SUCCEEDED(result)) {
     // Release the interfaces in case the SHChangeNotify call below depends on
@@ skipping 671 matching lines @@
   HANDLE cp = GetCurrentProcess();
   if (::GetMappedFileNameW(cp, file_view, mapped_file_path, kMaxPathLength)) {
     *nt_path = FilePath(mapped_file_path);
     success = true;
   }
   ::UnmapViewOfFile(file_view);
   return success;
 }
 
 }  // namespace file_util