Support the essential part of Shadow DOM v1

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 9424c99104e869278a40c197ea6195e534ec1599..9383f6b9af0d48a70a02b875120b0f2d654e9bf9 100644
--- a/third_party/WebKit/Source/core/dom/Node.h
+++ b/third_party/WebKit/Source/core/dom/Node.h
@@ -60,6 +60,7 @@ class FloatPoint;
 class LocalFrame;
 class HTMLInputElement;
 class HTMLQualifiedName;
+class HTMLSlotElement;
 class IntRect;
 class KeyboardEvent;
 class NSResolver;
@@ -295,6 +296,7 @@ public:
     bool isInsertionPoint() const { return getFlag(IsInsertionPointFlag); }
 
     bool canParticipateInComposedTree() const;
+    bool isSlotOrActiveInsertionPoint() const;
 
     bool hasCustomStyleCallbacks() const { return getFlag(HasCustomStyleCallbacksFlag); }
 
@@ -655,6 +657,8 @@ public:
     void updateAncestorConnectedSubframeCountForInsertion() const;
 
     PassRefPtrWillBeRawPtr<StaticNodeList> getDestinationInsertionPoints();
+    HTMLSlotElement* assignedSlot() const;
+    HTMLSlotElement* assignedSlotForBinding() { updateDistribution(); return assignedSlot(); }
 
     void setAlreadySpellChecked(bool flag) { setFlag(flag, AlreadySpellCheckedFlag); }
     bool isAlreadySpellChecked() { return getFlag(AlreadySpellCheckedFlag); }