Call Element::rebuildLayoutTree from Document::updateStyle directly

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 8a26e38bde88c7f6809dcd81070e0e62cd5c169b..3ffced8e04ea0447e2e5c4528a8baf8c329fd51d 100644
--- a/third_party/WebKit/Source/core/dom/Element.h
+++ b/third_party/WebKit/Source/core/dom/Element.h
@@ -417,7 +417,7 @@ class CORE_EXPORT Element : public ContainerNode {
   virtual LayoutObject* createLayoutObject(const ComputedStyle&);
   virtual bool layoutObjectIsNeeded(const ComputedStyle&);
   void recalcStyle(StyleRecalcChange, Text* nextTextSibling = nullptr);
-  StyleRecalcChange rebuildLayoutTree();
+  void rebuildLayoutTree();
   void pseudoStateChanged(CSSSelector::PseudoType);
   void setAnimationStyleChange(bool);
   void clearAnimationStyleChange();
@@ -770,6 +770,7 @@ class CORE_EXPORT Element : public ContainerNode {
 
   virtual void willRecalcStyle(StyleRecalcChange);
   virtual void didRecalcStyle();
+  virtual void didRebuildLayoutTree();
   virtual PassRefPtr<ComputedStyle> customStyleForLayoutObject();
 
   virtual bool shouldRegisterAsNamedItem() const { return false; }
@@ -836,6 +837,8 @@ class CORE_EXPORT Element : public ContainerNode {
   PassRefPtr<ComputedStyle> propagateInheritedProperties(StyleRecalcChange);
 
   StyleRecalcChange recalcOwnStyle(StyleRecalcChange, Text*);
+  void reattachPseudoElementLayoutTree(PseudoId);
+  void rebuildShadowRootLayoutTree();
   inline void checkForEmptyStyleChange();
 
   void updatePseudoElement(PseudoId, StyleRecalcChange);