List marker pseudo elements.

Source/core/dom/RenderTreeBuilder.cpp

Index: Source/core/dom/RenderTreeBuilder.cpp
diff --git a/Source/core/dom/RenderTreeBuilder.cpp b/Source/core/dom/RenderTreeBuilder.cpp
index 3db451dfcef58fad505cf3df9b58e76feac2a19d..9db6099b3b433390573b70381bc05dad9b4ba0aa 100644
--- a/Source/core/dom/RenderTreeBuilder.cpp
+++ b/Source/core/dom/RenderTreeBuilder.cpp
@@ -31,6 +31,7 @@
 #include "core/css/resolver/StyleResolver.h"
 #include "core/dom/FirstLetterPseudoElement.h"
 #include "core/dom/Fullscreen.h"
+#include "core/dom/MarkerPseudoElement.h"
 #include "core/dom/Node.h"
 #include "core/dom/PseudoElement.h"
 #include "core/dom/Text.h"
@@ -55,7 +56,7 @@ RenderTreeBuilderForElement::RenderTreeBuilderForElement(Element& element, Rende
     }
 }
 
-RenderObject* RenderTreeBuilderForElement::nextRenderer() const
+RenderObject* RenderTreeBuilderForElement::nextRenderer(RenderObject* parentRenderer) const
 {
     ASSERT(m_renderingParent);
 
@@ -65,6 +66,11 @@ RenderObject* RenderTreeBuilderForElement::nextRenderer() const
     if (m_node->isFirstLetterPseudoElement())
         return FirstLetterPseudoElement::firstLetterTextRenderer(*m_node);
 
+    if (m_node->isMarkerPseudoElement()) {
+        ASSERT(parentRenderer);
+        return MarkerPseudoElement::firstNonMarkerChild(parentRenderer);
+    }
+
     return RenderTreeBuilder::nextRenderer();
 }
 
@@ -72,6 +78,12 @@ RenderObject* RenderTreeBuilderForElement::parentRenderer() const
 {
     RenderObject* parentRenderer = RenderTreeBuilder::parentRenderer();
 
+    if (m_node->isMarkerPseudoElement()) {
+        ASSERT(m_renderingParent->isRenderBlockFlow());
+        if (RenderObject* markerRenderer = MarkerPseudoElement::getParentOfFirstLineBox(toRenderBlockFlow(m_renderingParent), nullptr))
+            return markerRenderer;
+    }
+
     if (parentRenderer) {
         // FIXME: Guarding this by parentRenderer isn't quite right as the spec for
         // top layer only talks about display: none ancestors so putting a <dialog> inside an
@@ -103,6 +115,9 @@ bool RenderTreeBuilderForElement::shouldCreateRenderer() const
     if (!parentRenderer->canHaveChildren())
         return false;
 
+    if (m_node->isMarkerPseudoElement() && m_renderingParent->style()->display() == LIST_ITEM)
+        return true;
+
     return m_node->rendererIsNeeded(style());
 }
 
@@ -132,7 +147,7 @@ void RenderTreeBuilderForElement::createRenderer()
     // for the first time. Otherwise code using inRenderFlowThread() in the styleWillChange and styleDidChange will fail.
     newRenderer->setFlowThreadState(parentRenderer->flowThreadState());
 
-    RenderObject* nextRenderer = this->nextRenderer();
+    RenderObject* nextRenderer = this->nextRenderer(parentRenderer);
     m_node->setRenderer(newRenderer);
     newRenderer->setStyle(&style); // setStyle() can depend on renderer() already being set.