Revert of Remove StringBuilder::appendLiteral.

third_party/WebKit/Source/core/html/forms/FormController.cpp

Index: third_party/WebKit/Source/core/html/forms/FormController.cpp
diff --git a/third_party/WebKit/Source/core/html/forms/FormController.cpp b/third_party/WebKit/Source/core/html/forms/FormController.cpp
index e28c74de0667c4fedec6f9f2d162cf2ef23f7748..f9c01cbfea366990b64929b04ce68a4cd31d4da7 100644
--- a/third_party/WebKit/Source/core/html/forms/FormController.cpp
+++ b/third_party/WebKit/Source/core/html/forms/FormController.cpp
@@ -312,7 +312,7 @@
     // 2 is enough to distinguish forms in webkit.org/b/91209#c0
     const size_t namedControlsToBeRecorded = 2;
     const FormAssociatedElement::List& controls = form.associatedElements();
-    builder.append(" [");
+    builder.appendLiteral(" [");
     for (size_t i = 0, namedControls = 0; i < controls.size() && namedControls < namedControlsToBeRecorded; ++i) {
         if (!controls[i]->isFormControlElementWithState())
             continue;
@@ -363,7 +363,7 @@
 
     StringBuilder formKeyBuilder;
     formKeyBuilder.append(signature);
-    formKeyBuilder.append(" #");
+    formKeyBuilder.appendLiteral(" #");
     formKeyBuilder.appendNumber(nextIndex);
     FormToKeyMap::AddResult addFormKeyresult = m_formToKeyMap.add(form, formKeyBuilder.toAtomicString());
     return addFormKeyresult.storedValue->value;