Add a UseCounter for the overflowchanged event

Source/core/dom/Document.cpp

Index: Source/core/dom/Document.cpp
diff --git a/Source/core/dom/Document.cpp b/Source/core/dom/Document.cpp
index 5721682d37bbe6c898fe8031d0ab2fa09ba1da97..6f009d641a9d8cd11ca9843d79b81b9e1c3762d7 100644
--- a/Source/core/dom/Document.cpp
+++ b/Source/core/dom/Document.cpp
@@ -3665,6 +3665,7 @@ void Document::addListenerTypeIfNeeded(const AtomicString& eventType)
         UseCounter::count(*this, UseCounter::DOMCharacterDataModifiedEvent);
         addMutationEventListenerTypeIfEnabled(DOMCHARACTERDATAMODIFIED_LISTENER);
     } else if (eventType == EventTypeNames::overflowchanged) {
+        UseCounter::count(*this, UseCounter::OverflowChangedEvent);
         addListenerType(OVERFLOWCHANGED_LISTENER);
     } else if (eventType == EventTypeNames::webkitAnimationStart || (RuntimeEnabledFeatures::cssAnimationUnprefixedEnabled() && eventType == EventTypeNames::animationstart)) {
         addListenerType(ANIMATIONSTART_LISTENER);