Merge 106874 - postMessage leaks MemoryEvent object

Source/WebCore/page/DOMWindow.cpp

Index: Source/WebCore/page/DOMWindow.cpp
===================================================================
--- Source/WebCore/page/DOMWindow.cpp	(revision 111123)
+++ Source/WebCore/page/DOMWindow.cpp	(working copy)
@@ -872,7 +872,7 @@
     // Give the embedder a chance to intercept this postMessage because this
     // DOMWindow might be a proxy for another in browsers that support
     // postMessage calls across WebKit instances.
-    if (isCurrentlyDisplayedInFrame() && m_frame->loader()->client()->willCheckAndDispatchMessageEvent(timer->targetOrigin(), PassRefPtr<MessageEvent>(event).leakRef()))
+    if (isCurrentlyDisplayedInFrame() && m_frame->loader()->client()->willCheckAndDispatchMessageEvent(timer->targetOrigin(), event.get()))
         return;
 
     if (timer->targetOrigin()) {