Reviewed by Adam Roben.

* platform/ScrollAnimator.cpp:
(WebCore::ScrollAnimator::handleWheelEvent):
* platform/ScrollAnimator.h:
Moved implementation of handleWheelEvent from ScrollView::wheelEvent.

* platform/ScrollView.cpp:
(WebCore::ScrollView::wheelEvent):
Call down to the ScrollableArea.

* platform/ScrollableArea.cpp:
(WebCore::ScrollableArea::handleWheelEvent):
Call down to the ScrollAnimator.

* platform/ScrollableArea.h:
(WebCore::ScrollableArea::scrollPosition):
(WebCore::ScrollableArea::minimumScrollPosition):
(WebCore::ScrollableArea::maximumScrollPosition):
(WebCore::ScrollableArea::visibleContentRect):
(WebCore::ScrollableArea::visibleHeight):
(WebCore::ScrollableArea::visibleWidth):
Add functions needed to implement wheel event in the animator.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@76757 268f45cc-cd09-0410-ab3c-d52691b4dbfc