[UI Views] Don't allow a ButtonListener and a MenuButtonListener

chrome/browser/ui/views/toolbar/toolbar_action_view.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/toolbar_action_view.h"
 
 #include <string>
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
@@ skipping 35 matching lines @@
     nullptr;
 
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // ToolbarActionView
 
 ToolbarActionView::ToolbarActionView(
     ToolbarActionViewController* view_controller,
     ToolbarActionView::Delegate* delegate)
-    : MenuButton(nullptr, base::string16(), this, false),
+    : MenuButton(base::string16(), this, false),
       view_controller_(view_controller),
       delegate_(delegate),
       called_register_command_(false),
       wants_to_run_(false),
       menu_(nullptr),
       ink_drop_delegate_(new views::ButtonInkDropDelegate(this, this)),
       weak_factory_(this) {
   set_ink_drop_delegate(ink_drop_delegate_.get());
   set_has_ink_drop_action_on_click(true);
   set_id(VIEW_ID_BROWSER_ACTION);
@@ skipping 263 matching lines @@
     if (menu_controller->in_nested_run()) {
       // There is another menu showing. Close the outermost menu (since we are
       // shown in the same menu, we don't want to close the whole thing).
       menu_controller->Cancel(views::MenuController::EXIT_OUTERMOST);
       return true;
     }
   }
 
   return false;
 }