Remove OS(WINCE) as blink and chromium does not support WinCe.

Source/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 2751 matching lines @@
 
     Document* doc = m_frame->document();
     if (!doc)
         return false;
 
     // Clear mouse press state to avoid initiating a drag while context menu is up.
     m_mousePressed = false;
 
     static const int kContextMenuMargin = 1;
 
-#if OS(WINDOWS) && !OS(WINCE)
+#if OS(WINDOWS)
     int rightAligned = ::GetSystemMetrics(SM_MENUDROPALIGNMENT);
 #else
     int rightAligned = 0;
 #endif
     IntPoint location;
 
     Node* focusedNode = doc->focusedNode();
     FrameSelection* selection = m_frame->selection();
     Position start = selection->selection().start();
 
@@ skipping 1208 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(DARWIN)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace WebCore