Switch speech synthesis from compile-flag to runtime-flag.

Source/modules/speech/SpeechSynthesisEvent.cpp

 /*
  * Copyright (C) 2013 Apple 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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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 #include "config.h"
 #include "modules/speech/SpeechSynthesisEvent.h"
 
-#if ENABLE(SPEECH_SYNTHESIS)
-
 namespace WebCore {
     
 PassRefPtr<SpeechSynthesisEvent> SpeechSynthesisEvent::create()
 {
     return adoptRef(new SpeechSynthesisEvent());
 }
 
 PassRefPtr<SpeechSynthesisEvent> SpeechSynthesisEvent::create(const AtomicString& type, unsigned long charIndex, float elapsedTime, const String& name)
 {
     return adoptRef(new SpeechSynthesisEvent(type, charIndex, elapsedTime, name));
 }
 
 SpeechSynthesisEvent::SpeechSynthesisEvent()
 {
     ScriptWrappable::init(this);
 }
 
 SpeechSynthesisEvent::SpeechSynthesisEvent(const AtomicString& type, unsigned long charIndex, float elapsedTime, const String& name)
     : Event(type, false, false)
     , m_charIndex(charIndex)
     , m_elapsedTime(elapsedTime)
     , m_name(name)
 {
 }
     
 } // namespace WebCore
-
-#endif // ENABLE(SPEECH_SYNTHESIS)