https://bugs.webkit.org/show_bug.cgi?id=122579

Reviewed by Antti Koivisto.

Removed UIRequestEventDispatchMediator, GestureEventDispatchMediator, KeyboardEventDispatchMediator,
and WheelEventDispatchMediator. Moved the code in the respective mediateAndDispatchEvent functions
to their respective dispatch*Event functions in Node.cpp and Element.cpp.

* Modules/indieui/UIRequestEvent.cpp:
(WebCore::UIRequestEvent::eventInterface):
* Modules/indieui/UIRequestEvent.h:
* dom/Element.cpp:
(WebCore::deltaMode):
(WebCore::Element::dispatchWheelEvent):
(WebCore::Element::dispatchKeyEvent):
* dom/GestureEvent.cpp:
* dom/GestureEvent.h:
* dom/KeyboardEvent.cpp:
* dom/KeyboardEvent.h:
* dom/Node.cpp:
(WebCore::Node::dispatchGestureEvent):
(WebCore::Node::dispatchUIRequestEvent):
* dom/WheelEvent.cpp:
* dom/WheelEvent.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@157195 268f45cc-cd09-0410-ab3c-d52691b4dbfc