Revert of Remove StringBuilder::appendLiteral.

third_party/WebKit/Source/core/editing/VisibleSelection.cpp

 /*
  * Copyright (C) 2004, 2005, 2006 Apple Computer, 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 899 matching lines @@
     fprintf(stderr, "================================\n");
 }
 
 template <typename Strategy>
 void VisibleSelectionTemplate<Strategy>::formatForDebugger(char* buffer, unsigned length) const
 {
     StringBuilder result;
     String s;
 
     if (isNone()) {
-        result.append("<none>");
+        result.appendLiteral("<none>");
     } else {
         const int FormatBufferSize = 1024;
         char s[FormatBufferSize];
-        result.append("from ");
+        result.appendLiteral("from ");
         start().formatForDebugger(s, FormatBufferSize);
         result.append(s);
-        result.append(" to ");
+        result.appendLiteral(" to ");
         end().formatForDebugger(s, FormatBufferSize);
         result.append(s);
     }
 
     strncpy(buffer, result.toString().utf8().data(), length - 1);
 }
 
 template <typename Strategy>
 void VisibleSelectionTemplate<Strategy>::showTreeForThis() const
 {
@@ skipping 60 matching lines @@
 {
     sel.showTreeForThis();
 }
 
 void showTree(const blink::VisibleSelectionInFlatTree* sel)
 {
     if (sel)
         sel->showTreeForThis();
 }
 #endif