Remove tons of OILPAN.

sky/engine/core/css/MediaQueryListEvent.h

Index: sky/engine/core/css/MediaQueryListEvent.h
diff --git a/sky/engine/core/css/MediaQueryListEvent.h b/sky/engine/core/css/MediaQueryListEvent.h
index c37f4382ef05ffea8ba2252e80381838067cfaac..1584d21c217c800b55e4d77873989997f2ecdad0 100644
--- a/sky/engine/core/css/MediaQueryListEvent.h
+++ b/sky/engine/core/css/MediaQueryListEvent.h
@@ -45,12 +45,6 @@ public:
 
     virtual const AtomicString& interfaceName() const override { return EventNames::MediaQueryListEvent; }
 
-    virtual void trace(Visitor* visitor) override
-    {
-        Event::trace(visitor);
-        visitor->trace(m_mediaQueryList);
-    }
-
 private:
     MediaQueryListEvent()
         : m_matches(false)