Remove unneeded and incorrect static_cast in AXMediaControlsContainer::controllingVideoElement

Source/core/accessibility/AXMediaControls.cpp

 /*
  * Copyright (C) 2009 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
@@ skipping 193 matching lines @@
 String AXMediaControlsContainer::helpText() const
 {
     return queryString(controllingVideoElement() ? WebLocalizedString::AXMediaVideoElementHelp : WebLocalizedString::AXMediaAudioElementHelp);
 }
 
 bool AXMediaControlsContainer::controllingVideoElement() const
 {
     if (!m_renderer->node())
         return true;
 
-    MediaControlTimeDisplayElement* element = static_cast<MediaControlTimeDisplayElement*>(m_renderer->node());
+    MediaControlDivElement* element = static_cast<MediaControlDivElement*>(m_renderer->node());

[inferno, 2014/07/02 15:49:17]

Why do we need a static_cast at all, why not just pass m_renderer->node() to
toParentMediaElement which accepts Node*

 
     return isHTMLVideoElement(toParentMediaElement(element));
 }
 
 bool AXMediaControlsContainer::computeAccessibilityIsIgnored() const
 {
     return accessibilityIsIgnoredByDefault();
 }
 
 //
@@ skipping 66 matching lines @@
 {
     if (!m_renderer || !m_renderer->node())
         return String();
 
     MediaControlTimeDisplayElement* element = static_cast<MediaControlTimeDisplayElement*>(m_renderer->node());
     float time = element->currentValue();
     return localizedMediaTimeDescription(fabsf(time));
 }
 
 } // namespace WebCore