Include HTMLMediaElement.h only where needed

Source/modules/webaudio/MediaElementAudioSourceNode.h

 /*
  * Copyright (C) 2011, 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
  * 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 MediaElementAudioSourceNode_h
 #define MediaElementAudioSourceNode_h
 
 #if ENABLE(WEB_AUDIO)
 
-#include "core/html/HTMLMediaElement.h"
 #include "platform/audio/AudioSourceProviderClient.h"
 #include "platform/audio/MultiChannelResampler.h"
 #include "modules/webaudio/AudioSourceNode.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/ThreadingPrimitives.h"
 
 namespace WebCore {
 
 class AudioContext;
+class HTMLMediaElement;
 
 class MediaElementAudioSourceNode FINAL : public AudioSourceNode, public AudioSourceProviderClient {
 public:
     static PassRefPtr<MediaElementAudioSourceNode> create(AudioContext*, HTMLMediaElement*);
 
     virtual ~MediaElementAudioSourceNode();
 
     HTMLMediaElement* mediaElement() { return m_mediaElement.get(); }
 
     // AudioNode
@@ skipping 18 matching lines @@
     double m_sourceSampleRate;
 
     OwnPtr<MultiChannelResampler> m_multiChannelResampler;
 };
 
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)
 
 #endif // MediaElementAudioSourceNode_h