Fix handling of dynamic changes for advanced CSS selectors (and avoid the cost of doing so in the normal case). b=401291, 75386, 98997, 229915, 404418 (blocking1.9+) r+sr=bzbarsky a=blocking1.9+ on 404418

layout/reftests/bugs/reftest.list

@@ -198,8 +198,8 @@ fails-if(MOZ_WIDGET_TOOLKIT!="cocoa") HTTP == 289480.html#top 289480-ref.html #
 == 315920-3c.html 315920-3-ref.html
 == 315920-3d.html 315920-3-ref.html
 != 315920-3e.html 315920-3-ref.html
-fails == 315920-4.html 315920-4-ref.html # bug 229915
-fails == 315920-5.html 315920-5-ref.html # bug 229915
+== 315920-4.html 315920-4-ref.html
+fails == 315920-5.html 315920-5-ref.html # bug 229915 ???
 == 315920-6.html 315920-6-ref.html
 == 315920-7a.html 315920-7-ref.html
 == 315920-7b.html 315920-7-ref.html
@@ -214,7 +214,7 @@ fails == 315920-5.html 315920-5-ref.html # bug 229915
 == 315920-12c.html 315920-12-ref.html
 == 315920-13a.html 315920-13-ref.html
 == 315920-13b.html 315920-13-ref.html
-fails == 315920-14.html 315920-14-ref.html # bug 229915
+== 315920-14.html 315920-14-ref.html
 == 315920-15.html 315920-15-ref.html
 == 315920-16.html 315920-16-ref.html
 == 315920-17.html 315920-17-ref.html
@@ -325,9 +325,9 @@ skip-if(MOZ_WIDGET_TOOLKIT=="windows") == 347496-1.xhtml 347496-1-ref.xhtml # Bu
 == 352980-1c.html 352980-1-ref.html
 == 352980-1d.html 352980-1-ref.html
 == 352980-1e.html 352980-1-ref.html
-fails == 352980-1f.html 352980-1-ref.html
+== 352980-1f.html 352980-1-ref.html
 == 352980-1g.html 352980-1-ref.html
-fails == 352980-1h.html 352980-1-ref.html
+== 352980-1h.html 352980-1-ref.html
 == 352980-1i.html 352980-1-ref.html
 == 352980-1j.html 352980-1-ref.html
 == 352980-1k.html 352980-1-ref.html