Bug 1430014 - Part 5: Stop building old style system classes when MOZ_OLD_STYLE is not defined. r=xidorn

MozReview-Commit-ID: CIHyPdF7Exl

dom/html/HTMLTrackElement.cpp

@@ -36,7 +36,9 @@
 #include "nsISupportsPrimitives.h"
 #include "nsMappedAttributes.h"
 #include "nsNetUtil.h"
+#ifdef MOZ_OLD_STYLE
 #include "nsRuleData.h"
+#endif
 #include "nsStyleConsts.h"
 #include "nsThreadUtils.h"
 #include "nsVideoFrame.h"