Remove HTMLVideoElement.

sky/engine/core/html/HTMLMediaElement.h

Index: sky/engine/core/html/HTMLMediaElement.h
diff --git a/sky/engine/core/html/HTMLMediaElement.h b/sky/engine/core/html/HTMLMediaElement.h
index f04f93d04f265d2b38fc875796f5ee614dd99957..36daa4239ae703ec9f21c1624d71740f87aa8ce9 100644
--- a/sky/engine/core/html/HTMLMediaElement.h
+++ b/sky/engine/core/html/HTMLMediaElement.h
@@ -181,7 +181,6 @@ public:
 
     // Predicates also used when dispatching wrapper creation (cf. [SpecialWrapFor] IDL attribute usage.)
     virtual bool isHTMLAudioElement() const { return false; }
-    virtual bool isHTMLVideoElement() const { return false; }
 
 protected:
     HTMLMediaElement(const QualifiedName&, Document&);
@@ -435,7 +434,7 @@ struct ValueToString<double> {
 
 inline bool isHTMLMediaElement(const HTMLElement& element)
 {
-    return isHTMLAudioElement(element) || isHTMLVideoElement(element);
+    return isHTMLAudioElement(element);
 }
 
 DEFINE_HTMLELEMENT_TYPE_CASTS_WITH_FUNCTION(HTMLMediaElement);