Include HTMLMediaElement.h only where needed

Source/modules/mediasource/MediaSourceBase.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 19 matching lines @@
 
 #include "config.h"
 #include "modules/mediasource/MediaSourceBase.h"
 
 #include "bindings/v8/ExceptionMessages.h"
 #include "bindings/v8/ExceptionState.h"
 #include "bindings/v8/ExceptionStatePlaceholder.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/events/Event.h"
 #include "core/events/GenericEventQueue.h"
+#include "core/html/HTMLMediaElement.h"
 #include "core/html/TimeRanges.h"
 #include "modules/mediasource/MediaSourceRegistry.h"
 #include "platform/Logging.h"
 #include "platform/TraceEvent.h"
 #include "public/platform/WebMediaSource.h"
 #include "public/platform/WebSourceBuffer.h"
 #include "wtf/text/WTFString.h"
 
 using blink::WebMediaSource;
 using blink::WebSourceBuffer;
@@ skipping 297 matching lines @@
 {
     return ActiveDOMObject::executionContext();
 }
 
 URLRegistry& MediaSourceBase::registry() const
 {
     return MediaSourceRegistry::registry();
 }
 
 }