InlinedVisitor: Migrate page to use inlined tracing

Source/core/page/CustomContextMenuProvider.cpp

 // Copyright 2014 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 "config.h"
 #include "core/page/CustomContextMenuProvider.h"
 
 #include "core/dom/Document.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/events/EventDispatcher.h"
@@ skipping 11 matching lines @@
 CustomContextMenuProvider::CustomContextMenuProvider(HTMLMenuElement& menu, HTMLElement& subject)
     : m_menu(menu)
     , m_subjectElement(subject)
 {
 }
 
 CustomContextMenuProvider::~CustomContextMenuProvider()
 {
 }
 
-void CustomContextMenuProvider::trace(Visitor* visitor)
+DEFINE_TRACE(CustomContextMenuProvider)
 {
     visitor->trace(m_menu);
     visitor->trace(m_subjectElement);
     visitor->trace(m_menuItems);
     ContextMenuProvider::trace(visitor);
 }
 
 void CustomContextMenuProvider::populateContextMenu(ContextMenu* menu)
 {
     populateContextMenuItems(*m_menu, *menu);
@@ skipping 89 matching lines @@
 
 HTMLElement* CustomContextMenuProvider::menuItemAt(unsigned menuId)
 {
     int itemIndex = menuId - ContextMenuItemBaseCustomTag;
     if (itemIndex < 0 || static_cast<unsigned long>(itemIndex) >= m_menuItems.size())
         return nullptr;
     return m_menuItems[itemIndex].get();
 }
 
 } // namespace blink