Bug 1967507 - Remove Document::GetAnonRootIfInAnonymousContentContainer. r=smaug

These bits are not needed now that AnonymousContent uses shadow DOM.

Differential Revision: https://phabricator.services.mozilla.com/D250530

dom/base/Document.cpp

@@ -8753,39 +8753,6 @@ void Document::RemoveAnonymousContent(AnonymousContent& aContent) {
   }
 }
 
-Element* Document::GetAnonRootIfInAnonymousContentContainer(
-    nsINode* aNode) const {
-  if (!aNode->IsInNativeAnonymousSubtree()) {
-    return nullptr;
-  }
-
-  PresShell* presShell = GetPresShell();
-  if (!presShell || !presShell->GetCanvasFrame()) {
-    return nullptr;
-  }
-
-  nsAutoScriptBlocker scriptBlocker;
-  nsCOMPtr<Element> customContainer =
-      presShell->GetCanvasFrame()->GetCustomContentContainer();
-  if (!customContainer) {
-    return nullptr;
-  }
-
-  // An arbitrary number of elements can be inserted as children of the custom
-  // container frame.  We want the one that was added that contains aNode, so
-  // we need to keep track of the last child separately using |child| here.
-  nsINode* child = aNode;
-  nsINode* parent = aNode->GetParentNode();
-  while (parent && parent->IsInNativeAnonymousSubtree()) {
-    if (parent == customContainer) {
-      return Element::FromNode(child);
-    }
-    child = parent;
-    parent = child->GetParentNode();
-  }
-  return nullptr;
-}
-
 Maybe<ClientInfo> Document::GetClientInfo() const {
   if (const Document* orig = GetOriginalDocument()) {
     if (Maybe<ClientInfo> info = orig->GetClientInfo()) {

dom/base/Document.h

@@ -1310,13 +1310,6 @@ class Document : public nsINode,
   already_AddRefed<AnonymousContent> InsertAnonymousContent(bool aForce,
                                                             ErrorResult&);
   void RemoveAnonymousContent(AnonymousContent&);
-  /**
-   * If aNode is a descendant of anonymous content inserted by
-   * InsertAnonymousContent, this method returns the root element of the
-   * inserted anonymous content (in other words, the clone of the aElement
-   * that was passed to InsertAnonymousContent).
-   */
-  Element* GetAnonRootIfInAnonymousContentContainer(nsINode* aNode) const;
   nsTArray<RefPtr<AnonymousContent>>& GetAnonymousContents() {
     return mAnonymousContents;
   }

dom/base/IDTracker.cpp

@@ -80,20 +80,6 @@ void IDTracker::ResetToURIWithFragmentID(Element& aFrom, nsIURI* aURI,
     return;
   }
 
-  if (aFrom.IsInNativeAnonymousSubtree()) {
-    // This happens, for example, if aFromContent is part of the content
-    // inserted by a call to Document::InsertAnonymousContent, which we
-    // also want to handle.  (It also happens for other native anonymous content
-    // etc.)
-    Element* anonRoot = doc->GetAnonRootIfInAnonymousContentContainer(&aFrom);
-    if (anonRoot) {
-      mElement = nsContentUtils::MatchElementId(anonRoot, ref);
-      // We don't have watching working yet for anonymous content, so bail out
-      // here.
-      return;
-    }
-  }
-
   bool isEqualExceptRef;
   rv = aURI->EqualsExceptRef(doc->GetDocumentURI(), &isEqualExceptRef);
   RefPtr<nsAtom> refAtom = NS_Atomize(ref);