Fix <dialog> centering

Source/WebCore/dom/NodeRenderingContext.cpp

Index: Source/WebCore/dom/NodeRenderingContext.cpp
diff --git a/Source/WebCore/dom/NodeRenderingContext.cpp b/Source/WebCore/dom/NodeRenderingContext.cpp
index 9a19e68d1a5dd7e7a991d069b745a33df01d5139..1093d5d3ec29cb8465b932a6a2e9bc7daedad778 100644
--- a/Source/WebCore/dom/NodeRenderingContext.cpp
+++ b/Source/WebCore/dom/NodeRenderingContext.cpp
@@ -80,7 +80,7 @@ static bool isRendererReparented(const RenderObject* renderer)
     if (renderer->style() && !renderer->style()->flowThread().isEmpty())
         return true;
 #if ENABLE(DIALOG_ELEMENT)
-    if (toElement(renderer->node())->isInTopLayer())
+    if (renderer->isDialog())
         return true;
 #endif
     return false;
@@ -154,7 +154,7 @@ RenderObject* NodeRenderingContext::parentRenderer() const
         return renderer->parent();
 
 #if ENABLE(DIALOG_ELEMENT)
-    if (m_node->isElementNode() && toElement(m_node)->isInTopLayer()) {
+    if (m_node->hasTagName(dialogTag)) {

[esprehn, 2013/04/09 02:24:31]

This is just for testing right?

[falken, 2013/04/09 02:30:26]

Kind of. There's an idea to make the containing block of any dialog the i.c.b.
so they would all be parented by the RenderView. But this would require spec
changes and I'm not sure the code in this WIP patch plays well with top layer.

         // The parent renderer of top layer elements is the RenderView, but only
         // if the normal parent would have had a renderer.
         // FIXME: This behavior isn't quite right as the spec for top layer