Remove dead code

Source/core/dom/custom/CustomElementObserver.h

Index: Source/core/dom/custom/CustomElementObserver.h
diff --git a/Source/core/dom/custom/CustomElementObserver.h b/Source/core/dom/custom/CustomElementObserver.h
index 3a48d755ddfa9039d0be8dad21ed078e15495cc1..5b522aae57f7b074a2b581f55a97c4f0f13fa46c 100644
--- a/Source/core/dom/custom/CustomElementObserver.h
+++ b/Source/core/dom/custom/CustomElementObserver.h
@@ -43,7 +43,6 @@ public:
     virtual ~CustomElementObserver() { }
 
     // API for CustomElement to kick off notifications
-    static void notifyElementDidFinishParsingChildren(Element*);
     static void notifyElementWasDestroyed(Element*);
 
     virtual void trace(Visitor*) { }
@@ -54,7 +53,6 @@ protected:
     void observe(Element*);
     void unobserve(Element*);
 
-    virtual void elementDidFinishParsingChildren(Element*) = 0;
     virtual void elementWasDestroyed(Element* element) { unobserve(element); }
 };