Removing #ifdefs for WEB_AUDIO compile time flag.

Source/modules/webaudio/AudioBufferSourceNode.idl

 /*
  * Copyright (C) 2010, 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:
  * 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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
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  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 // A cached (non-streamed), memory-resident audio source
 [
-    Conditional=WEB_AUDIO,
     TypeChecking=Interface,
 ] interface AudioBufferSourceNode : AudioSourceNode {
     [RaisesException=Setter] attribute AudioBuffer buffer;
 
     readonly attribute AudioParam playbackRate;
 
     attribute boolean loop;
     attribute double loopStart;
     attribute double loopEnd;
 
     [RaisesException] void start(optional double when, optional double grainOffset, optional double grainDuration);
     [RaisesException] void stop(optional double when);
 
     attribute EventHandler onended;
 };