Reviewed by Eric Carlson.

No new tests. (Currently no way to test such site specific hack behavior)

* html/HTMLMediaElement.cpp:
(WebCore::HTMLMediaElement::HTMLMediaElement):
(WebCore::HTMLMediaElement::asyncEventTimerFired): If the event to be dispatched is the canplay
  event, wrap the dispatch with m_dispatchingCanPlayEvent set.
(WebCore::HTMLMediaElement::play): If m_dispatchingCanPlayEvent is true and the site is npr.org, 
  don't perform the play().
* html/HTMLMediaElement.h: Add m_dispatchingCanPlayEvent member.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@58586 268f45cc-cd09-0410-ab3c-d52691b4dbfc