From e0f0b34926b75c842a3228ea8d42b5bc44cacd9b Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@wolfbeast.com>
Date: Mon, 23 Dec 2019 00:02:26 +0100
Subject: Issue #1118 - Part 8: Remove no-longer-used mDidDocumentOpen and
 CheckForOutdatedParent()

This was only used to check for cases when document.open() changed the
global, and elements being inserted into the document needing a new
reflector as a result.

Since document.open() no longer changes the global, this code is no
longer needed.
---
 dom/base/nsIDocument.h      |  9 ---------
 dom/base/nsINode.cpp        | 29 -----------------------------
 dom/html/nsHTMLDocument.cpp |  2 --
 3 files changed, 40 deletions(-)

(limited to 'dom')

diff --git a/dom/base/nsIDocument.h b/dom/base/nsIDocument.h
index e2b34f7e3..fdaee39ca 100644
--- a/dom/base/nsIDocument.h
+++ b/dom/base/nsIDocument.h
@@ -909,10 +909,6 @@ public:
    */
   nsresult GetSrcdocData(nsAString& aSrcdocData);
 
-  bool DidDocumentOpen() {
-    return mDidDocumentOpen;
-  }
-
   already_AddRefed<mozilla::dom::AnonymousContent>
   InsertAnonymousContent(mozilla::dom::Element& aElement,
                          mozilla::ErrorResult& aError);
@@ -3159,11 +3155,6 @@ protected:
   // Whether the document was created by a srcdoc iframe.
   bool mIsSrcdocDocument : 1;
 
-  // Records whether we've done a document.open. If this is true, it's possible
-  // for nodes from this document to have outdated wrappers in their wrapper
-  // caches.
-  bool mDidDocumentOpen : 1;
-
   // Whether this document has a display document and thus is considered to
   // be a resource document.  Normally this is the same as !!mDisplayDocument,
   // but mDisplayDocument is cleared during Unlink.  mHasDisplayDocument is
diff --git a/dom/base/nsINode.cpp b/dom/base/nsINode.cpp
index ca507a5fc..212110b72 100644
--- a/dom/base/nsINode.cpp
+++ b/dom/base/nsINode.cpp
@@ -1549,27 +1549,6 @@ AdoptNodeIntoOwnerDoc(nsINode *aParent, nsINode *aNode)
   return NS_OK;
 }
 
-static nsresult
-CheckForOutdatedParent(nsINode* aParent, nsINode* aNode)
-{
-  if (JSObject* existingObjUnrooted = aNode->GetWrapper()) {
-    JS::Rooted<JSObject*> existingObj(RootingCx(), existingObjUnrooted);
-
-    AutoJSContext cx;
-    nsIGlobalObject* global = aParent->OwnerDoc()->GetScopeObject();
-    MOZ_ASSERT(global);
-
-    if (js::GetGlobalForObjectCrossCompartment(existingObj) !=
-        global->GetGlobalJSObject()) {
-      JSAutoCompartment ac(cx, existingObj);
-      nsresult rv = ReparentWrapper(cx, existingObj);
-      NS_ENSURE_SUCCESS(rv, rv);
-    }
-  }
-
-  return NS_OK;
-}
-
 static nsresult
 ReparentWrappersInSubtree(nsIContent* aRoot)
 {
@@ -1631,9 +1610,6 @@ nsINode::doInsertChildAt(nsIContent* aKid, uint32_t aIndex,
   if (OwnerDoc() != aKid->OwnerDoc()) {
     rv = AdoptNodeIntoOwnerDoc(this, aKid);
     NS_ENSURE_SUCCESS(rv, rv);
-  } else if (OwnerDoc()->DidDocumentOpen()) {
-    rv = CheckForOutdatedParent(this, aKid);
-    NS_ENSURE_SUCCESS(rv, rv);
   }
 
   uint32_t childCount = aChildArray.ChildCount();
@@ -2481,11 +2457,6 @@ nsINode::ReplaceOrInsertBefore(bool aReplace, nsINode* aNewChild,
     if (aError.Failed()) {
       return nullptr;
     }
-  } else if (doc->DidDocumentOpen()) {
-    aError = CheckForOutdatedParent(this, aNewChild);
-    if (aError.Failed()) {
-      return nullptr;
-    }
   }
 
   /*
diff --git a/dom/html/nsHTMLDocument.cpp b/dom/html/nsHTMLDocument.cpp
index 112e957cb..0f2d90673 100644
--- a/dom/html/nsHTMLDocument.cpp
+++ b/dom/html/nsHTMLDocument.cpp
@@ -1586,8 +1586,6 @@ nsHTMLDocument::Open(JSContext* cx,
   SetReadyStateInternal(READYSTATE_UNINITIALIZED,
                         /* updateTimingInformation = */ false);
 
-  mDidDocumentOpen = true;
-
   // Step 13 - Set our compatibility mode to standards.
   SetCompatibilityMode(eCompatibility_FullStandards);
 
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