Remove tons of OILPAN.

sky/engine/core/html/HTMLImageElement.cpp

Index: sky/engine/core/html/HTMLImageElement.cpp
diff --git a/sky/engine/core/html/HTMLImageElement.cpp b/sky/engine/core/html/HTMLImageElement.cpp
index 428c08c3e8c97e8263d580ba2a7c6c03d06e52f6..4bf05c94ec536fa0fd24543c58051dbffba7fffb 100644
--- a/sky/engine/core/html/HTMLImageElement.cpp
+++ b/sky/engine/core/html/HTMLImageElement.cpp
@@ -59,14 +59,8 @@ public:
             m_element->notifyViewportChanged();
     }
 
-#if !ENABLE(OILPAN)
     void clearElement() { m_element = nullptr; }
-#endif
-    virtual void trace(Visitor* visitor) override
-    {
-        visitor->trace(m_element);
-        MediaQueryListListener::trace(visitor);
-    }
+
 private:
     explicit ViewportChangeListener(HTMLImageElement* element) : m_element(element) { }
     RawPtr<HTMLImageElement> m_element;
@@ -102,13 +96,6 @@ HTMLImageElement::~HTMLImageElement()
 #endif
 }
 
-void HTMLImageElement::trace(Visitor* visitor)
-{
-    visitor->trace(m_imageLoader);
-    visitor->trace(m_listener);
-    HTMLElement::trace(visitor);
-}
-
 void HTMLImageElement::notifyViewportChanged()
 {
     // Re-selecting the source URL in order to pick a more fitting resource