Drop slower Node::hasID() / Node::hasClass() methods

Source/core/rendering/RenderTreeAsText.cpp

 /*
  * Copyright (C) 2004, 2006, 2007 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 330 matching lines @@
                         break;
                     default:
                         text = quoteAndEscapeNonPrintables(text);
                 }
             }
             ts << ": " << text;
         }
     }
 
     if (behavior & RenderAsTextShowIDAndClass) {
-        if (Node* node = o.node()) {
-            if (node->hasID())
-                ts << " id=\"" + toElement(node)->getIdAttribute() + "\"";
+        Node* node = o.node();
+        if (node && node->isElementNode()) {
+            Element& element = toElement(*node);
+            if (element.hasID())
+                ts << " id=\"" + element.getIdAttribute() + "\"";
 
-            if (node->hasClass()) {
+            if (element.hasClass()) {
                 ts << " class=\"";
-                Element* element = toElement(node);
-                for (size_t i = 0; i < element->classNames().size(); ++i) {
+                for (size_t i = 0; i < element.classNames().size(); ++i) {
                     if (i > 0)
                         ts << " ";
-                    ts << element->classNames()[i];
+                    ts << element.classNames()[i];
                 }
                 ts << "\"";
             }
         }
     }
 
     if (behavior & RenderAsTextShowLayoutState) {
         bool needsLayout = o.selfNeedsLayout() || o.needsPositionedMovementLayout() || o.posChildNeedsLayout() || o.normalChildNeedsLayout();
         if (needsLayout)
             ts << " (needs layout:";
@@ skipping 398 matching lines @@
     element->document().updateLayout();
 
     RenderObject* renderer = element->renderer();
     if (!renderer || !renderer->isListItem())
         return String();
 
     return toRenderListItem(renderer)->markerText();
 }
 
 } // namespace blink