Use ContextMenu code path that was guarded by CROSS_PLATFORM_CONTEXT_MENU

Source/WebKit/chromium/src/WebViewImpl.cpp

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 3498 matching lines @@
 #endif
 }
 
 void WebViewImpl::performCustomContextMenuAction(unsigned action)
 {
     if (!m_page)
         return;
     ContextMenu* menu = m_page->contextMenuController()->contextMenu();
     if (!menu)
         return;
-    ContextMenuItem* item = menu->itemWithAction(static_cast<ContextMenuAction>(ContextMenuItemBaseCustomTag + action));
+    const ContextMenuItem* item = menu->itemWithAction(static_cast<ContextMenuAction>(ContextMenuItemBaseCustomTag + action));
     if (item)
         m_page->contextMenuController()->contextMenuItemSelected(item);
     m_page->contextMenuController()->clearContextMenu();
 }
 
 void WebViewImpl::showContextMenu()
 {
     if (!page())
         return;
 
@@ skipping 661 matching lines @@
 }
 
 bool WebViewImpl::shouldDisableDesktopWorkarounds()
 {
     ViewportArguments arguments = mainFrameImpl()->frame()->document()->viewportArguments();
     return arguments.width == ViewportArguments::ValueDeviceWidth || !arguments.userZoom
         || (arguments.minZoom == arguments.maxZoom && arguments.minZoom != ViewportArguments::ValueAuto);
 }
 
 } // namespace WebKit