Unreviewed, rolling out r137691.

Unreviewed, rolling out r137691.
http://trac.webkit.org/changeset/137691
https://bugs.webkit.org/show_bug.cgi?id=104764

panscroll test on AppleWin failed

* CMakeLists.txt:
* GNUmakefile.list.am:
* Target.pri:
* WebCore.gypi:
* WebCore.vcproj/WebCore.vcproj:
* WebCore.xcodeproj/project.pbxproj:
* page/AutoscrollController.cpp: Removed.
* page/AutoscrollController.h: Removed.
* page/EventHandler.cpp:
(WebCore):
(WebCore::EventHandler::EventHandler):
(WebCore::canAutoscroll):
(WebCore::EventHandler::handleMouseDraggedEvent):
(WebCore::EventHandler::handleMouseReleaseEvent):
(WebCore::EventHandler::handleAutoscroll):
(WebCore::EventHandler::autoscrollTimerFired):
(WebCore::EventHandler::startPanScrolling):
(WebCore::EventHandler::updatePanScrollState):
(WebCore::EventHandler::autoscrollRenderer):
(WebCore::EventHandler::updateAutoscrollRenderer):
(WebCore::EventHandler::setAutoscrollRenderer):
(WebCore::EventHandler::startAutoscrollTimer):
(WebCore::EventHandler::stopAutoscrollTimer):
(WebCore::EventHandler::selectCursor):
(WebCore::EventHandler::handleMousePressEvent):
(WebCore::EventHandler::keyEvent):
* page/EventHandler.h:
(EventHandler):
(WebCore::EventHandler::autoscrollInProgress):
* rendering/RenderBox.cpp:
* rendering/RenderBox.h:
(RenderBox):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@137703 268f45cc-cd09-0410-ab3c-d52691b4dbfc