Make slotchange events bubble

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

Index: third_party/WebKit/Source/core/html/HTMLSlotElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLSlotElement.cpp b/third_party/WebKit/Source/core/html/HTMLSlotElement.cpp
index de9fa21b90981cc7362f68ac9134779bb871cf0c..ee7300a11fa72921c1c503c42a1d24486d30e447 100644
--- a/third_party/WebKit/Source/core/html/HTMLSlotElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLSlotElement.cpp
@@ -154,7 +154,7 @@ void HTMLSlotElement::saveAndClearDistribution()
 void HTMLSlotElement::dispatchSlotChangeEvent()
 {
     m_slotchangeEventEnqueued = false;
-    Event* event = Event::create(EventTypeNames::slotchange);
+    Event* event = Event::createBubble(EventTypeNames::slotchange);
     event->setTarget(this);
     dispatchScopedEvent(event);
 }