Add Traversal<*Element>::firstAncestor() API

Source/core/html/HTMLFrameSetElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann (hausmann@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2006, 2009, 2010 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 151 matching lines @@
     if (style->hasContent())
         return RenderObject::createObject(this, style);
 
     return new RenderFrameSet(this);
 }
 
 void HTMLFrameSetElement::attach(const AttachContext& context)
 {
     // Inherit default settings from parent frameset
     // FIXME: This is not dynamic.
-    for (ContainerNode* node = parentNode(); node; node = node->parentNode()) {
-        if (isHTMLFrameSetElement(*node)) {
-            HTMLFrameSetElement& frameset = toHTMLFrameSetElement(*node);
-            if (!m_frameborderSet)
-                m_frameborder = frameset.hasFrameBorder();
-            if (m_frameborder) {
-                if (!m_borderSet)
-                    m_border = frameset.border();
-                if (!m_borderColorSet)
-                    m_borderColorSet = frameset.hasBorderColor();
-            }
-            if (!m_noresize)
-                m_noresize = frameset.noResize();
-            break;
+    if (HTMLFrameSetElement* frameset = Traversal<HTMLFrameSetElement>::firstAncestor(*this)) {
+        if (!m_frameborderSet)
+            m_frameborder = frameset->hasFrameBorder();
+        if (m_frameborder) {
+            if (!m_borderSet)
+                m_border = frameset->border();
+            if (!m_borderColorSet)
+                m_borderColorSet = frameset->hasBorderColor();
         }
+        if (!m_noresize)
+            m_noresize = frameset->noResize();
     }
 
     HTMLElement::attach(context);
 }
 
 void HTMLFrameSetElement::defaultEventHandler(Event* evt)
 {
     if (evt->isMouseEvent() && !m_noresize && renderer() && renderer()->isFrameSet()) {
         if (toRenderFrameSet(renderer())->userResize(toMouseEvent(evt))) {
             evt->setDefaultHandled();
@@ skipping 25 matching lines @@
     Element* frameElement = children()->namedItem(name);
     if (!isHTMLFrameElement(frameElement))
         return 0;
     Document* document = toHTMLFrameElement(frameElement)->contentDocument();
     if (!document || !document->frame())
         return 0;
     return document->domWindow();
 }
 
 } // namespace WebCore