Revert of Remove StringBuilder::appendLiteral.

third_party/WebKit/Source/web/WebAXObject.cpp

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 739 matching lines @@
         return WebString();
 
     DEFINE_STATIC_LOCAL(String, modifierString, ());
     if (modifierString.isNull()) {
         unsigned modifiers = EventHandler::accessKeyModifiers();
         // Follow the same order as Mozilla MSAA implementation:
         // Ctrl+Alt+Shift+Meta+key. MSDN states that keyboard shortcut strings
         // should not be localized and defines the separator as "+".
         StringBuilder modifierStringBuilder;
         if (modifiers & PlatformEvent::CtrlKey)
-            modifierStringBuilder.append("Ctrl+");
+            modifierStringBuilder.appendLiteral("Ctrl+");
         if (modifiers & PlatformEvent::AltKey)
-            modifierStringBuilder.append("Alt+");
+            modifierStringBuilder.appendLiteral("Alt+");
         if (modifiers & PlatformEvent::ShiftKey)
-            modifierStringBuilder.append("Shift+");
+            modifierStringBuilder.appendLiteral("Shift+");
         if (modifiers & PlatformEvent::MetaKey)
-            modifierStringBuilder.append("Win+");
+            modifierStringBuilder.appendLiteral("Win+");
         modifierString = modifierStringBuilder.toString();
     }
 
     return String(modifierString + accessKey);
 }
 
 WebString WebAXObject::language() const
 {
     if (isDetached())
         return WebString();
@@ skipping 786 matching lines @@
     m_private = object;
     return *this;
 }
 
 WebAXObject::operator AXObject*() const
 {
     return m_private.get();
 }
 
 } // namespace blink