Get rid of a redundant argument DOWNSTREAM from VisbileSelection constructor call sites

Source/core/page/FocusController.cpp

 /*
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nuanti Ltd.
  *
  * 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.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 728 matching lines @@
 
     if (&newDocument != document) {
         // Focus is going away from this document, so clear the focused node.
         document->setFocusedElement(nullptr);
     }
 
     setFocusedFrame(newDocument.frame());
 
     if (caretBrowsing) {
         Position position = firstPositionInOrBeforeNode(element.get());
-        VisibleSelection newSelection(position, position, DOWNSTREAM);
+        VisibleSelection newSelection(position, position);
         frame->selection().setSelection(newSelection);
     }
 
     element->focus(false, type, sourceCapabilities);
     return true;
 }
 
 Element* FocusController::findFocusableElement(WebFocusType type, Node& node)
 {
     // FIXME: No spacial navigation code yet.
@@ skipping 289 matching lines @@
     return consumed;
 }
 
 DEFINE_TRACE(FocusController)
 {
     visitor->trace(m_page);
     visitor->trace(m_focusedFrame);
 }
 
 } // namespace blink