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

Source/modules/speech/SpeechSynthesisVoice.h

 /*
  * 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
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef SpeechSynthesisVoice_h
 #define SpeechSynthesisVoice_h
 
-#if ENABLE(SPEECH_SYNTHESIS)
-
 #include "core/platform/PlatformSpeechSynthesisVoice.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class SpeechSynthesisVoice : public RefCounted<SpeechSynthesisVoice> {
 public:
     virtual ~SpeechSynthesisVoice() { }
     static PassRefPtr<SpeechSynthesisVoice> create(PassRefPtr<PlatformSpeechSynthesisVoice>);
     
     const String& voiceURI() const { return m_platformVoice->voiceURI(); }
     const String& name() const { return m_platformVoice->name(); }
     const String& lang() const { return m_platformVoice->lang(); }
     bool localService() const { return m_platformVoice->localService(); }
     bool isDefault() const { return m_platformVoice->isDefault(); }
     
     PlatformSpeechSynthesisVoice* platformVoice() const { return m_platformVoice.get(); }
 
 private:
     explicit SpeechSynthesisVoice(PassRefPtr<PlatformSpeechSynthesisVoice>);
     
     RefPtr<PlatformSpeechSynthesisVoice> m_platformVoice;
 };
 
 } // namespace WebCore
 
-#endif // ENABLE(SPEECH_SYNTHESIS)
-
 #endif // SpeechSynthesisVoice_h