Remove context menus.

sky/engine/public/web/WebInputEvent.h

 /*
  * Copyright (C) 2009 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 76 matching lines @@
         Undefined = -1,
         TypeFirst = Undefined,
 
         // WebMouseEvent
         MouseDown,
         MouseTypeFirst = MouseDown,
         MouseUp,
         MouseMove,
         MouseEnter,
         MouseLeave,
-        ContextMenu,
-        MouseTypeLast = ContextMenu,
+        MouseTypeLast = MouseLeave,
 
         // WebMouseWheelEvent
         MouseWheel,
 
         // WebKeyboardEvent
         RawKeyDown,
         KeyboardTypeFirst = RawKeyDown,
         KeyDown,
         KeyUp,
         Char,
@@ skipping 403 matching lines @@
         , cancelable(true)
     {
     }
 };
 
 #pragma pack(pop)
 
 } // namespace blink
 
 #endif