Revert of Remove StringBuilder::appendLiteral.

third_party/WebKit/Source/core/layout/LayoutTreeAsText.cpp

Index: third_party/WebKit/Source/core/layout/LayoutTreeAsText.cpp
diff --git a/third_party/WebKit/Source/core/layout/LayoutTreeAsText.cpp b/third_party/WebKit/Source/core/layout/LayoutTreeAsText.cpp
index 2ad494a75c4f8ce34910e49d5d5ad477a4675bf7..f874b06b1f00bd86b40c2e3412273325ba59eea7 100644
--- a/third_party/WebKit/Source/core/layout/LayoutTreeAsText.cpp
+++ b/third_party/WebKit/Source/core/layout/LayoutTreeAsText.cpp
@@ -721,11 +721,11 @@
     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()) {
@@ -733,14 +733,14 @@
                 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");
         }
     }