List marker pseudo elements.

Source/core/rendering/RenderObject.cpp

Index: Source/core/rendering/RenderObject.cpp
diff --git a/Source/core/rendering/RenderObject.cpp b/Source/core/rendering/RenderObject.cpp
index 31ef55b2640d041f77aa202fa76652f8aeadb880..bc8aa7a9a79fac7c3d850d3aea8bc7c71959c86a 100644
--- a/Source/core/rendering/RenderObject.cpp
+++ b/Source/core/rendering/RenderObject.cpp
@@ -1575,7 +1575,8 @@ StyleDifference RenderObject::adjustStyleDifference(StyleDifference diff) const
 
 void RenderObject::setPseudoStyle(PassRefPtr<RenderStyle> pseudoStyle)
 {
-    ASSERT(pseudoStyle->styleType() == BEFORE || pseudoStyle->styleType() == AFTER || pseudoStyle->styleType() == FIRST_LETTER);
+    ASSERT(pseudoStyle->styleType() == BEFORE || pseudoStyle->styleType() == AFTER || pseudoStyle->styleType() == FIRST_LETTER ||
+        (RuntimeEnabledFeatures::listMarkerPseudoElementEnabled() && pseudoStyle->styleType() == MARKER));
 
     // FIXME: We should consider just making all pseudo items use an inherited style.
 
@@ -2626,7 +2627,8 @@ RenderStyle* RenderObject::cachedFirstLineStyle() const
 
 RenderStyle* RenderObject::getCachedPseudoStyle(PseudoId pseudo, RenderStyle* parentStyle) const
 {
-    if (pseudo < FIRST_INTERNAL_PSEUDOID && !style()->hasPseudoStyle(pseudo))
+    // FIXME: adding display != LIST_ITEM seems wrong ... wrap in method?
+    if (pseudo < FIRST_INTERNAL_PSEUDOID && !style()->hasPseudoStyle(pseudo) && style()->display() != LIST_ITEM)
         return 0;
 
     RenderStyle* cachedStyle = style()->getCachedPseudoStyle(pseudo);