List marker pseudo elements.

Source/core/dom/MarkerPseudoElement.h

Index: Source/core/dom/MarkerPseudoElement.h
diff --git a/Source/core/dom/MarkerPseudoElement.h b/Source/core/dom/MarkerPseudoElement.h
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+++ b/Source/core/dom/MarkerPseudoElement.h
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+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MarkerPseudoElement_h
+#define MarkerPseudoElement_h
+
+#include "core/dom/PseudoElement.h"
+
+namespace blink {
+
+class RenderBlockFlow;
+class RenderListMarker;
+
+class MarkerPseudoElement final : public PseudoElement {
+    WTF_MAKE_NONCOPYABLE(MarkerPseudoElement);
+public:
+    static PassRefPtrWillBeRawPtr<MarkerPseudoElement> create(Element* parent)
+    {
+        return adoptRefWillBeNoop(new MarkerPseudoElement(parent));
+    }
+
+    virtual ~MarkerPseudoElement();
+
+    void attach(const AttachContext& = AttachContext()) override;
+    void removeListMarker();
+
+    RenderObject* createRenderer(RenderStyle*) override;
+
+    // FIXME: Make these private and file static when old code is removed.
+    static RenderObject* getParentOfFirstLineBox(RenderBlockFlow* curr, const RenderObject* marker);
+    static RenderObject* firstNonMarkerChild(RenderObject* parent);
+
+    static PassRefPtr<RenderStyle> styleForListMarkerRenderer(RenderObject&, RenderStyle*);
+
+private:
+    explicit MarkerPseudoElement(Element*);
+
+    PassRefPtr<RenderStyle> customStyleForRenderer();
+
+    void didRecalcStyle(StyleRecalcChange) override;
+
+    void attachListMarkerRenderer();
+};
+
+DEFINE_ELEMENT_TYPE_CASTS(MarkerPseudoElement, isMarkerPseudoElement());
+
+} // namespace blink
+
+#endif // MarkerPseudoElement_h