Remove ASCIILiteral optimization from StringImpl

Source/wtf/text/WTFString.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007-2009 Torch Mobile, Inc.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 61 matching lines @@
 String::String(const LChar* characters)
     : m_impl(characters ? StringImpl::create(characters) : 0)
 {
 }
 
 String::String(const char* characters)
     : m_impl(characters ? StringImpl::create(reinterpret_cast<const LChar*>(characters)) : 0)
 {
 }
 
-String::String(ASCIILiteral characters)
-    : m_impl(StringImpl::createFromLiteral(characters))
-{
-}
-
 void String::append(const String& string)
 {
     if (string.isEmpty())
         return;
     if (!m_impl) {
         m_impl = string.m_impl;
         return;
     }
 
     // FIXME: This is extremely inefficient. So much so that we might want to take this
@@ skipping 1160 matching lines @@
     buffer.append('\0');
     return buffer;
 }
 
 Vector<char> asciiDebug(String& string)
 {
     return asciiDebug(string.impl());
 }
 
 #endif