"window.eventSender" is a DRT specific property to assist testing. Right now we have DumpRenderTree/java/EventSender.cpp which registers "eventSender" property to DOM world using JavaScriptCore APIs.

Actual implementation resides in EventSender.java, EventSender.cpp acts a wrapper to EventSender.java. Since we support Java2JavaScript bridge, register "eventSender" property using Java2JavaScirpt bridge APIs.

It removes upcalls to EventSender.java and helps to remove the wrapper.