Change Play from a nsIFileSpec to a nsIURL so it would compile

r=kedl

widget/src/photon/nsSound.cpp

@@ -72,7 +72,7 @@ NS_METHOD nsSound::Beep()
   return NS_OK;
 }
 
-NS_METHOD nsSound::Play(nsIFileSpec *filespec)
+NS_METHOD nsSound::Play(nsIURI *aURI)
 {
   PR_LOG(PhWidLog, PR_LOG_DEBUG, ("nsSound::Play - Not Implemented\n"));
   NS_NOTYETIMPLEMENTED("nsSound::Play");