Move a static member function nodeIsUserSelectNone() out from PositionAlgorithm template class

Source/core/html/HTMLLabelElement.cpp

Index: Source/core/html/HTMLLabelElement.cpp
diff --git a/Source/core/html/HTMLLabelElement.cpp b/Source/core/html/HTMLLabelElement.cpp
index 4451cc59d8191964a702562e3178122d3db6ff28..0e3cf36324403f87c97825834984e67c7048755a 100644
--- a/Source/core/html/HTMLLabelElement.cpp
+++ b/Source/core/html/HTMLLabelElement.cpp
@@ -161,7 +161,7 @@ void HTMLLabelElement::defaultEventHandler(Event* evt)
             if (LocalFrame* frame = document().frame()) {
                 // Check if there is a selection and click is not on the
                 // selection.
-                if (!Position::nodeIsUserSelectNone(this) && frame->selection().isRange() && !frame->eventHandler().selectionController().mouseDownWasSingleClickInSelection())
+                if (!nodeIsUserSelectNone(this) && frame->selection().isRange() && !frame->eventHandler().selectionController().mouseDownWasSingleClickInSelection())
                     isLabelTextSelected = true;
                 // If selection is there and is single click i.e. text is
                 // selected by dragging over label text, then return.