Use TreeScope::completeURL and baseURL instead of the Document versions

Source/core/rendering/RenderObject.cpp

Index: Source/core/rendering/RenderObject.cpp
diff --git a/Source/core/rendering/RenderObject.cpp b/Source/core/rendering/RenderObject.cpp
index 77b99b30e0ff38e48b956bd8632a847308beca28..59f97dabbfe9d19fe2f00920fef2ebff90ba30b9 100644
--- a/Source/core/rendering/RenderObject.cpp
+++ b/Source/core/rendering/RenderObject.cpp
@@ -1171,10 +1171,10 @@ void RenderObject::addPDFURLRect(GraphicsContext* context, const LayoutRect& rec
     const AtomicString& href = toElement(n)->getAttribute(hrefAttr);
     if (href.isNull())
         return;
-    KURL url = n->document().completeURL(href);
+    KURL url = n->treeScope().completeURL(href);
     if (!url.isValid())
         return;
-    if (context->supportsURLFragments() && url.hasFragmentIdentifier() && equalIgnoringFragmentIdentifier(url, n->document().baseURL())) {
+    if (context->supportsURLFragments() && url.hasFragmentIdentifier() && equalIgnoringFragmentIdentifier(url, n->treeScope().baseURL())) {
         String name = url.fragmentIdentifier();
         if (document().findAnchor(name))
             context->setURLFragmentForRect(name, pixelSnappedIntRect(rect));