Remove straggling bits of listboxes.

sky/engine/core/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 555 matching lines @@
     if (event.event().button() != LeftButton || !targetNode)
         return false;
 
     RenderObject* renderer = targetNode->renderer();
     if (!renderer) {
         Node* parent = NodeRenderingTraversal::parent(targetNode);
         if (!parent)
             return false;
 
         renderer = parent->renderer();
-        if (!renderer || !renderer->isListBox())
+        if (!renderer)
             return false;
     }
 
     m_mouseDownMayStartDrag = false;
 
     if (m_mouseDownMayStartAutoscroll) {
         if (AutoscrollController* controller = autoscrollController()) {
             controller->startAutoscrollForSelection(renderer);
             m_mouseDownMayStartAutoscroll = false;
         }
@@ skipping 2225 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace blink