Pass nextTextSibling to ::before layout rebuild.

third_party/WebKit/Source/core/dom/Element.h

Index: third_party/WebKit/Source/core/dom/Element.h
diff --git a/third_party/WebKit/Source/core/dom/Element.h b/third_party/WebKit/Source/core/dom/Element.h
index 7a640326ea91f546cd304d3be6e6edf918c4bd0a..0fae18fbd293ad2d4530451c5893d532b6837715 100644
--- a/third_party/WebKit/Source/core/dom/Element.h
+++ b/third_party/WebKit/Source/core/dom/Element.h
@@ -846,8 +846,9 @@ class CORE_EXPORT Element : public ContainerNode {
   PassRefPtr<ComputedStyle> propagateInheritedProperties(StyleRecalcChange);
 
   StyleRecalcChange recalcOwnStyle(StyleRecalcChange);
-  void reattachPseudoElementLayoutTree(PseudoId);
-  void rebuildShadowRootLayoutTree();
+  void rebuildPseudoElementLayoutTree(PseudoId,
+                                      Text* nextTextSibling = nullptr);
+  void rebuildShadowRootLayoutTree(Text*& nextTextSibling);
   inline void checkForEmptyStyleChange();
 
   void updatePseudoElement(PseudoId, StyleRecalcChange);