PageVisibility API: Ensure bubbling events are generated

third_party/WebKit/Source/core/dom/Document.cpp

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index c544728907199ece1367b6ba13a3ea1f8dc966eb..b83cbfa0830cb77af2135dd19d185109200fb8ca 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -1377,9 +1377,9 @@ bool Document::hidden() const
 
 void Document::didChangeVisibilityState()
 {
-    dispatchEvent(Event::create(EventTypeNames::visibilitychange));
+    dispatchEvent(Event::createBubble(EventTypeNames::visibilitychange));
     // Also send out the deprecated version until it can be removed.
-    dispatchEvent(Event::create(EventTypeNames::webkitvisibilitychange));
+    dispatchEvent(Event::createBubble(EventTypeNames::webkitvisibilitychange));
 
     PageVisibilityState state = pageVisibilityState();
     for (DocumentVisibilityObserver* observer : m_visibilityObservers)