Allow the user to drag an extension to the overflow menu, even when its empty

chrome/browser/ui/views/toolbar/wrench_menu.cc

 // Copyright 2013 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 "chrome/browser/ui/views/toolbar/wrench_menu.h"
 
 #include <algorithm>
 #include <cmath>
 #include <set>
 
@@ skipping 1119 matching lines @@
       item->SetMargins(top_margin, bottom_margin);
     }
 
     if (model->GetTypeAt(i) == MenuModel::TYPE_SUBMENU)
       PopulateMenu(item, model->GetSubmenuModelAt(i));
 
     switch (model->GetCommandIdAt(i)) {
       case IDC_EXTENSIONS_OVERFLOW_MENU: {
         scoped_ptr<ExtensionToolbarMenuView> extension_toolbar(
             new ExtensionToolbarMenuView(browser_, this));
-        if (extension_toolbar->GetPreferredSize().height() > 0)
+        if (extension_toolbar->ShouldShow())
           item->AddChildView(extension_toolbar.release());
         else
           item->SetVisible(false);
         break;
       }
 
       case IDC_CUT:
         DCHECK_EQ(MenuModel::TYPE_COMMAND, model->GetTypeAt(i));
         DCHECK_LT(i + 2, max);
         DCHECK_EQ(IDC_COPY, model->GetCommandIdAt(i + 1));
@@ skipping 110 matching lines @@
                                 0,
                                 BookmarkMenuDelegate::SHOW_PERMANENT_FOLDERS,
                                 BOOKMARK_LAUNCH_LOCATION_WRENCH_MENU);
 }
 
 int WrenchMenu::ModelIndexFromCommandId(int command_id) const {
   CommandIDToEntry::const_iterator ix = command_id_to_entry_.find(command_id);
   DCHECK(ix != command_id_to_entry_.end());
   return ix->second.second;
 }