Clean up the SelectionControl class with c++11 enum class

Source/core/input/EventHandler.cpp

Index: Source/core/input/EventHandler.cpp
diff --git a/Source/core/input/EventHandler.cpp b/Source/core/input/EventHandler.cpp
index ed72ddf7134747ec0f7302532c2da5e16c164a68..5123479619fc97d199368ea68b2bb115b0a59aea 100644
--- a/Source/core/input/EventHandler.cpp
+++ b/Source/core/input/EventHandler.cpp
@@ -2638,7 +2638,7 @@ bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event, Node* o
     HitTestRequest request(HitTestRequest::Active);
     MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, positionInContents, event);
 
-    selectionController().sendContextMenuEvent(mev, positionInContents);
+    selectionController().prepareForContextMenu(mev, positionInContents);
 
     Node* targetNode = overrideTargetNode ? overrideTargetNode : mev.innerNode();
     return !dispatchMouseEvent(EventTypeNames::contextmenu, targetNode, 0, event, false);
@@ -3845,7 +3845,7 @@ void EventHandler::setLastKnownMousePosition(const PlatformMouseEvent& event)
 
 bool EventHandler::passMousePressEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe)
 {
-    selectionController().passMousePressEventToSubframe(mev);
+    selectionController().preparePassMousePressEventToSubframe(mev);
     subframe->eventHandler().handleMousePressEvent(mev.event());
     return true;
 }