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

Source/core/input/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 2620 matching lines @@
     FrameView* v = m_frame->view();
     if (!v)
         return false;
 
     // Clear mouse press state to avoid initiating a drag while context menu is up.
     m_mousePressed = false;
     LayoutPoint positionInContents = v->rootFrameToContents(event.position());
     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);
 }
 
 bool EventHandler::sendContextMenuEventForKey(Element* overrideTargetElement)
 {
     FrameView* view = m_frame->view();
     if (!view)
         return false;
@@ skipping 1186 matching lines @@
 
 void EventHandler::setLastKnownMousePosition(const PlatformMouseEvent& event)
 {
     m_mousePositionIsUnknown = false;
     m_lastKnownMousePosition = event.position();
     m_lastKnownMouseGlobalPosition = event.globalPosition();
 }
 
 bool EventHandler::passMousePressEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe)
 {
-    selectionController().passMousePressEventToSubframe(mev);
+    selectionController().preparePassMousePressEventToSubframe(mev);
     subframe->eventHandler().handleMousePressEvent(mev.event());
     return true;
 }
 
 bool EventHandler::passMouseMoveEventToSubframe(MouseEventWithHitTestResults& mev, LocalFrame* subframe, HitTestResult* hoveredNode)
 {
     if (m_mouseDownMayStartDrag)
         return false;
     subframe->eventHandler().handleMouseMoveOrLeaveEvent(mev.event(), hoveredNode);
     return true;
@@ skipping 31 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace blink