pageshow event does not follow spec

Source/core/frame/DOMWindow.cpp

Index: Source/core/frame/DOMWindow.cpp
diff --git a/Source/core/frame/DOMWindow.cpp b/Source/core/frame/DOMWindow.cpp
index 9d85771d908ce7868b7e3d666b68851fcef5a44d..555c733a5819c851d2ee24ca4935d5635c231e17 100644
--- a/Source/core/frame/DOMWindow.cpp
+++ b/Source/core/frame/DOMWindow.cpp
@@ -453,7 +453,8 @@ void DOMWindow::documentWasClosed()
 
 void DOMWindow::enqueuePageshowEvent(PageshowEventPersistence persisted)
 {
-    // FIXME: https://bugs.webkit.org/show_bug.cgi?id=36334 Pageshow event needs to fire asynchronously.

[tkent, 2014/05/30 01:05:50]

IMO we should not remove the FIXME. We should add a sentence about IE and
Firefox behavior.
Also, we should talk to the standard body.

+    // As per spec pageshow must be triggered asyncronously.

[Inactive, 2014/05/29 21:19:39]

asynchronously

+    // However to be compatible with other browsers blink fires pageshow syncronously.
     dispatchEvent(PageTransitionEvent::create(EventTypeNames::pageshow, persisted), m_document.get());
 }