Make custom layout actually work.

sky/engine/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003-2011, 2013, 2014 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 183 matching lines @@
     void recalcStyle(StyleRecalcChange);
     void setAnimationStyleChange(bool);
     void setNeedsAnimationStyleRecalc();
 
     bool supportsStyleSharing() const;
 
     ElementShadow* shadow() const;
     ElementShadow& ensureShadow();
     PassRefPtr<ShadowRoot> ensureShadowRoot(ExceptionState&);
     ShadowRoot* shadowRoot() const;
+    bool hasAuthorShadowRoot() const { return shadowRoot(); }
 
     double x() const;
     void setX(double);
 
     double y() const;
     void setY(double);
 
     double width() const;
     void setWidth(double);
 
     double height() const;
     void setHeight(double);
 
-    bool hasAuthorShadowRoot() const { return shadowRoot(); }
+    void setNeedsLayout();
+    void layout();
 
     LayoutCallback* layoutManager() const;
     void setLayoutManager(PassOwnPtr<LayoutCallback>);
 
     RenderStyle* computedStyle();
 
     bool isUpgradedCustomElement() const { return customElementState() == Upgraded; }
     bool isUnresolvedCustomElement() const { return customElementState() == WaitingForUpgrade; }
 
     AtomicString computeInheritedLanguage() const;
@@ skipping 345 matching lines @@
     static PassRefPtr<T> create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
     PassRefPtr<T> T::create(const QualifiedName& tagName, Document& document) \
     { \
         return adoptRef(new T(tagName, document)); \
     }
 
 } // namespace
 
 #endif  // SKY_ENGINE_CORE_DOM_ELEMENT_H_