https://bugs.webkit.org/show_bug.cgi?id=74831

Reviewed by Dan Bernstein.

../WebCore: 

* platform/PlatformMouseEvent.h:
(WebCore::PlatformMouseEvent::position):
Rename pos -> position(). Remove x() and y() accessors.

(WebCore::PlatformMouseEvent::globalPosition):
Added. Replaces globalX() and globalY() accessors.

(WebCore::PlatformMouseEvent::movementDelta):
Added. Replaces movementX() and movementY() accessors.

* platform/PlatformWheelEvent.h:
(WebCore::PlatformWheelEvent::position):
Renamed pos -> position().

(WebCore::PlatformWheelEvent::globalPosition):
Renamed globalPos -> globalPosition().

* dom/MouseEvent.cpp:
(WebCore::MouseEvent::create):
* dom/WheelEvent.cpp:
(WebCore::WheelEventDispatchMediator::WheelEventDispatchMediator):
* page/DragController.cpp:
(WebCore::DragController::startDrag):
* page/EventHandler.cpp:
(WebCore::EventHandler::handleMousePressEventSingleClick):
(WebCore::EventHandler::handleMousePressEvent):
(WebCore::EventHandler::eventMayStartDrag):
(...