Replace Element::isMediaElement() with isHTMLMediaElement

Source/core/dom/Element.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2013 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 421 matching lines @@
 
     virtual bool matchesReadOnlyPseudoClass() const { return false; }
     virtual bool matchesReadWritePseudoClass() const { return false; }
     bool matches(const String& selectors, ExceptionState&);
     virtual bool shouldAppearIndeterminate() const { return false; }
 
     DOMTokenList& classList();
 
     DOMStringMap& dataset();
 
-    virtual bool isMediaElement() const { return false; }
-
 #if ENABLE(INPUT_SPEECH)
     virtual bool isInputFieldSpeechButtonElement() const { return false; }
 #endif
 #if ENABLE(INPUT_MULTIPLE_FIELDS_UI)
     virtual bool isDateTimeEditElement() const { return false; }
     virtual bool isDateTimeFieldElement() const { return false; }
     virtual bool isPickerIndicatorElement() const { return false; }
 #endif
 
     virtual bool isFormControlElement() const { return false; }
@@ skipping 440 matching lines @@
     template <> inline bool isElementOfType<const thisType>(const Element& element) { return element.predicate; } \
     DEFINE_NODE_TYPE_CASTS(thisType, predicate)
 
 #define DEFINE_ELEMENT_TYPE_CASTS_WITH_FUNCTION(thisType) \
     template <> inline bool isElementOfType<const thisType>(const Element& element) { return is##thisType(element); } \
     DEFINE_NODE_TYPE_CASTS_WITH_FUNCTION(thisType)
 
 } // namespace
 
 #endif