Pass clickEvent to controlElement inside label if targetNode can't start selection

third_party/WebKit/Source/core/html/HTMLLabelElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLLabelElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLLabelElement.cpp b/third_party/WebKit/Source/core/html/HTMLLabelElement.cpp
index e7201cc8106fcef156f23cda124b738045181e62..666eb8880dee4825fe3cbfd2e4883d0a699d109a 100644
--- a/third_party/WebKit/Source/core/html/HTMLLabelElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLLabelElement.cpp
@@ -173,7 +173,8 @@ void HTMLLabelElement::DefaultEventHandler(Event* evt) {
                 .IsRange() &&
             !frame->GetEventHandler()
                  .GetSelectionController()
-                 .MouseDownWasSingleClickInSelection())
+                 .MouseDownWasSingleClickInSelection() &&
+            evt->target()->ToNode()->CanStartSelection())
           is_label_text_selected = true;
         // If selection is there and is single click i.e. text is
         // selected by dragging over label text, then return.