Revert of Remove StringBuilder::appendLiteral.

third_party/WebKit/Source/core/layout/LayoutTreeAsText.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 703 matching lines @@
 
 String nodePositionAsStringForTesting(Node* node)
 {
     StringBuilder result;
 
     Element* body = node->document().body();
     Node* parent;
     for (Node* n = node; n; n = parent) {
         parent = n->parentOrShadowHostNode();
         if (n != node)
-            result.append(" of ");
+            result.appendLiteral(" of ");
         if (parent) {
             if (body && n == body) {
                 // We don't care what offset body may be in the document.
-                result.append("body");
+                result.appendLiteral("body");
                 break;
             }
             if (n->isShadowRoot()) {
                 result.append('{');
                 result.append(getTagName(n));
                 result.append('}');
             } else {
-                result.append("child ");
+                result.appendLiteral("child ");
                 result.appendNumber(n->nodeIndex());
-                result.append(" {");
+                result.appendLiteral(" {");
                 result.append(getTagName(n));
                 result.append('}');
             }
         } else {
-            result.append("document");
+            result.appendLiteral("document");
         }
     }
 
     return result.toString();
 }
 
 static void writeSelection(TextStream& ts, const LayoutObject* o)
 {
     Node* n = o->node();
     if (!n || !n->isDocumentNode())
@@ skipping 91 matching lines @@
     element->document().updateStyleAndLayout();
 
     LayoutObject* layoutObject = element->layoutObject();
     if (!layoutObject || !layoutObject->isListItem())
         return String();
 
     return toLayoutListItem(layoutObject)->markerText();
 }
 
 } // namespace blink