Make custom layout actually work.

sky/engine/core/dom/Element.cpp

 /*
  * 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)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 907 matching lines @@
 
 double Element::width() const
 {
     if (RenderBox* box = renderBox())
         return box->width();
     return 0;
 }
 
 void Element::setWidth(double width)
 {
-    if (RenderBox* box = renderBox())
-        return box->setWidth(width);
+    if (RenderBox* box = renderBox()) {
+        box->setWidth(width);
+        // TODO(ojan): Remove override widths once we remove box layout from the C++ code.
+        box->setOverrideLogicalContentWidth(width);
+    }
 }
 
 double Element::height() const
 {
     if (RenderBox* box = renderBox())
         return box->height();
     return 0;
 }
 
 void Element::setHeight(double height)
 {
     if (RenderBox* box = renderBox())
         return box->setHeight(height);
 }
 
+void Element::setNeedsLayout()
+{
+    if (RenderBox* box = renderBox())
+        box->setNeedsLayout();
+}
+
+void Element::layout()
+{
+    if (RenderBox* box = renderBox())
+        box->layoutIfNeeded();
+}
+
 LayoutCallback* Element::layoutManager() const
 {
     return m_layoutManager.get();
 }
 
 void Element::setLayoutManager(PassOwnPtr<LayoutCallback> callback)
 {
+    if (renderer() && !renderer()->isRenderCustomLayout()) {
+        // We don't go through the normal reattach codepaths because
+        // those are all tied to changes to the RenderStyle.
+        markAncestorsWithChildNeedsStyleRecalc();
+        detach();
+    }
     m_layoutManager = callback;
 }
 
 void Element::childrenChanged(const ChildrenChange& change)
 {
     ContainerNode::childrenChanged(change);
 
     if (ElementShadow* shadow = this->shadow())
         shadow->setNeedsDistributionRecalc();
 }
@@ skipping 659 matching lines @@
         return false;
     if (treeScope().scopedStyleResolver().hasSelectorForId(idValue))
         return true;
     // Host rules could also have effects.
     if (ShadowRoot* shadowRoot = this->shadowRoot())
         return shadowRoot->scopedStyleResolver().hasSelectorForId(idValue);
     return false;
 }
 
 } // namespace blink