Support slotchange event

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

Index: third_party/WebKit/Source/core/dom/Node.h
diff --git a/third_party/WebKit/Source/core/dom/Node.h b/third_party/WebKit/Source/core/dom/Node.h
index 0bd6a11cad88718559cd4e1096b0799bf08b98eb..e5ce52f2bcc87c09dc6f6b340dfded072efd46c8 100644
--- a/third_party/WebKit/Source/core/dom/Node.h
+++ b/third_party/WebKit/Source/core/dom/Node.h
@@ -375,6 +375,7 @@ public:
     void clearNeedsStyleInvalidation() { clearFlag(NeedsStyleInvalidationFlag); }
     void setNeedsStyleInvalidation();
 
+    void updateAssignment();
     void updateDistribution();
 
     bool svgFilterNeedsLayerUpdate() const { return getFlag(SVGFilterNeedsLayerUpdateFlag); }
@@ -472,6 +473,7 @@ public:
     bool isInV0ShadowTree() const;
     bool isChildOfV1ShadowHost() const;
     bool isChildOfV0ShadowHost() const;
+    bool isChildOfSlot() const;
     bool isSlotAssignable() const { return isTextNode() || isElementNode(); }
 
     bool isDocumentTypeNode() const { return getNodeType() == DOCUMENT_TYPE_NODE; }
@@ -781,6 +783,7 @@ private:
     bool isUserActionElementHovered() const;
     bool isUserActionElementFocused() const;
 
+    void recalcAssignment();
     void recalcDistribution();
 
     void setStyleChange(StyleChangeType);