Move Node::dispatchSimulatedClick() to Element.
<http://webkit.org/b/116784>

Reviewed by Antti Koivisto.

Only Elements use the dispatchSimulatedClick() functionality, so move it there.

* dom/Node.cpp:
* dom/Node.h:
* dom/Element.h:
* dom/Element.cpp:
(WebCore::Element::dispatchSimulatedClick):
* dom/EventDispatcher.h:
* dom/EventDispatcher.cpp:
(WebCore::EventDispatcher::dispatchSimulatedClick):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@150714 268f45cc-cd09-0410-ab3c-d52691b4dbfc