Remove all uses of the ASCIILiteral class.

Source/modules/webmidi/MIDIPort.cpp

 /*
  * Copyright (C) 2013 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 43 matching lines @@
 
 MIDIPort::~MIDIPort()
 {
     stop();
 }
 
 String MIDIPort::type() const
 {
     switch (m_type) {
     case MIDIPortTypeInput:
-        return ASCIILiteral("input");
+        return "input";
     case MIDIPortTypeOutput:
-        return ASCIILiteral("output");
+        return "output";
     default:
         ASSERT_NOT_REACHED();
     }
     return emptyString();
 }
 
 } // namespace WebCore