Bug 474740, SVG SMIL: dur="media" is incorrectly reported as a parsing error

--HG--
extra : rebase_source : 98c0109978ad9fed21351cad36932a2d7f6bed52

content/smil/nsSMILTimedElement.cpp

@@ -446,7 +446,7 @@ nsSMILTimedElement::SetSimpleDuration(const nsAString& aDurSpec)
   rv = nsSMILParserUtils::ParseClockValue(aDurSpec, &duration,
           nsSMILParserUtils::kClockValueAllowIndefinite, &isMedia);
 
-  if (NS_FAILED(rv) || (!duration.IsResolved() && !duration.IsIndefinite())) {
+  if (NS_FAILED(rv)) {
     mSimpleDur.SetIndefinite();
     return NS_ERROR_FAILURE;
   }