Make GetReattachParent a member of Node.

We will need it outside of node.cc for layout tree rebuild root.

Bug: 868810
Change-Id: If428d5c1f954686c70c35631718c5fa270c8971b
Reviewed-on: https://chromium-review.googlesource.com/1217422Reviewed-by: Anders Ruud <andruud@chromium.org>
Commit-Queue: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590223}

third_party/blink/renderer/core/dom/node.cc

@@ -872,27 +872,27 @@ void Node::MarkAncestorsWithChildNeedsStyleRecalc() {
   GetDocument().ScheduleLayoutTreeUpdateIfNeeded();
 }
 
-static ContainerNode* GetReattachParent(Node& node) {
-  if (node.IsPseudoElement())
-    return node.ParentOrShadowHostNode();
-  if (node.IsChildOfV1ShadowHost()) {
-    if (HTMLSlotElement* slot = node.AssignedSlot())
+ContainerNode* Node::GetReattachParent() const {
+  if (IsPseudoElement())
+    return ParentOrShadowHostNode();
+  if (IsChildOfV1ShadowHost()) {
+    if (HTMLSlotElement* slot = AssignedSlot())
       return slot;
   }
-  if (node.IsInV0ShadowTree() || node.IsChildOfV0ShadowHost()) {
-    if (ShadowRootWhereNodeCanBeDistributedForV0(node)) {
+  if (IsInV0ShadowTree() || IsChildOfV0ShadowHost()) {
+    if (ShadowRootWhereNodeCanBeDistributedForV0(*this)) {
       if (V0InsertionPoint* insertion_point =
-              const_cast<V0InsertionPoint*>(ResolveReprojection(&node))) {
+              const_cast<V0InsertionPoint*>(ResolveReprojection(this))) {
         return insertion_point;
       }
     }
   }
-  return node.ParentOrShadowHostNode();
+  return ParentOrShadowHostNode();
 }
 
 void Node::MarkAncestorsWithChildNeedsReattachLayoutTree() {
-  for (ContainerNode* p = GetReattachParent(*this);
-       p && !p->ChildNeedsReattachLayoutTree(); p = GetReattachParent(*p))
+  for (ContainerNode* p = GetReattachParent();
+       p && !p->ChildNeedsReattachLayoutTree(); p = p->GetReattachParent())
     p->SetChildNeedsReattachLayoutTree();
 }
 

third_party/blink/renderer/core/dom/node.h

@@ -600,6 +600,7 @@ class CORE_EXPORT Node : public EventTarget {
   bool IsChildOfV1ShadowHost() const;
   bool IsChildOfV0ShadowHost() const;
   ShadowRoot* V1ShadowRootOfParent() const;
+  ContainerNode* GetReattachParent() const;
 
   bool IsDocumentTypeNode() const { return getNodeType() == kDocumentTypeNode; }
   virtual bool ChildTypeAllowed(NodeType) const { return false; }