Labels with user-select: none should pass events to control element

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 04255f4ca9724d69b05aea06fc57f269ae7d39d9..a316aa94c2435b55167921096df5b8e846903f49 100644
--- a/Source/core/html/HTMLLabelElement.cpp
+++ b/Source/core/html/HTMLLabelElement.cpp
@@ -160,7 +160,7 @@ void HTMLLabelElement::defaultEventHandler(Event* evt)
             if (LocalFrame* frame = document().frame()) {
                 // Check if there is a selection and click is not on the
                 // selection.
-                if (frame->selection().isRange() && !frame->eventHandler().mouseDownWasSingleClickInSelection())
+                if (!Position::nodeIsUserSelectNone(this) && frame->selection().isRange() && !frame->eventHandler().mouseDownWasSingleClickInSelection())
                     isLabelTextSelected = true;
                 // If selection is there and is single click i.e. text is
                 // selected by dragging over label text, then return.