Bug 1704686: Rename Document::GetTopLevelContentDocument. r=nika

It's deprecated, and returns null if the top document isn't in-process, so its
name should be clear on that point.

Differential Revision: https://phabricator.services.mozilla.com/D111771

dom/base/Document.cpp

@@ -15081,7 +15081,7 @@ WindowContext* Document::GetTopLevelWindowContext() const {
   return windowContext ? windowContext->TopWindowContext() : nullptr;
 }
 
-Document* Document::GetTopLevelContentDocument() {
+Document* Document::GetTopLevelContentDocumentIfSameProcess() {
   Document* parent;
 
   if (!mLoadedAsData) {
@@ -15115,38 +15115,8 @@ Document* Document::GetTopLevelContentDocument() {
   return parent;
 }
 
-const Document* Document::GetTopLevelContentDocument() const {
-  const Document* parent;
-
-  if (!mLoadedAsData) {
-    parent = this;
-  } else {
-    nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(GetScopeObject());
-    if (!window) {
-      return nullptr;
-    }
-
-    parent = window->GetExtantDoc();
-    if (!parent) {
-      return nullptr;
-    }
-  }
-
-  do {
-    if (parent->IsTopLevelContentDocument()) {
-      break;
-    }
-
-    // If we ever have a non-content parent before we hit a toplevel content
-    // parent, then we're never going to find one.  Just bail.
-    if (!parent->IsContentDocument()) {
-      return nullptr;
-    }
-
-    parent = parent->GetInProcessParentDocument();
-  } while (parent);
-
-  return parent;
+const Document* Document::GetTopLevelContentDocumentIfSameProcess() const {
+  return const_cast<Document*>(this)->GetTopLevelContentDocumentIfSameProcess();
 }
 
 void Document::PropagateImageUseCounters(Document* aReferencingDocument) {

dom/base/Document.h

@@ -3253,8 +3253,11 @@ class Document : public nsINode,
 
   WindowContext* GetTopLevelWindowContext() const;
 
-  Document* GetTopLevelContentDocument();
-  const Document* GetTopLevelContentDocument() const;
+  // If the top-level ancestor content document for this document is in the same
+  // process, returns it. Otherwise, returns null. This function is not
+  // Fission-compatible, and should not be used in new code.
+  Document* GetTopLevelContentDocumentIfSameProcess();
+  const Document* GetTopLevelContentDocumentIfSameProcess() const;
 
   // Returns the associated app window if this is a top-level chrome document,
   // null otherwise.

dom/base/nsGlobalWindowOuter.cpp

@@ -3800,7 +3800,7 @@ Maybe<CSSIntSize> nsGlobalWindowOuter::GetRDMDeviceSize(
 
   // Bug 1576256: This does not work for cross-process subframes.
   const Document* topInProcessContentDoc =
-      aDocument.GetTopLevelContentDocument();
+      aDocument.GetTopLevelContentDocumentIfSameProcess();
   BrowsingContext* bc = topInProcessContentDoc
                             ? topInProcessContentDoc->GetBrowsingContext()
                             : nullptr;

dom/canvas/CanvasUtils.cpp

@@ -86,7 +86,8 @@ bool IsImageExtractionAllowed(dom::Document* aDocument, JSContext* aCx,
     return true;
   }
 
-  dom::Document* topLevelDocument = aDocument->GetTopLevelContentDocument();
+  dom::Document* topLevelDocument =
+      aDocument->GetTopLevelContentDocumentIfSameProcess();
   nsIURI* topLevelDocURI =
       topLevelDocument ? topLevelDocument->GetDocumentURI() : nullptr;
   nsCString topLevelDocURISpec;

dom/media/MediaDevices.cpp

@@ -47,7 +47,7 @@ already_AddRefed<Promise> MediaDevices::GetUserMedia(
     if (!owner->IsSecureContext()) {
       doc->SetUseCounter(eUseCounter_custom_GetUserMediaInsec);
     }
-    Document* topDoc = doc->GetTopLevelContentDocument();
+    Document* topDoc = doc->GetTopLevelContentDocumentIfSameProcess();
     IgnoredErrorResult ignored;
     if (topDoc && !topDoc->HasFocus(ignored)) {
       doc->SetUseCounter(eUseCounter_custom_GetUserMediaUnfocused);
@@ -101,7 +101,7 @@ already_AddRefed<Promise> MediaDevices::EnumerateDevices(CallerType aCallerType,
     if (!owner->IsSecureContext()) {
       doc->SetUseCounter(eUseCounter_custom_EnumerateDevicesInsec);
     }
-    Document* topDoc = doc->GetTopLevelContentDocument();
+    Document* topDoc = doc->GetTopLevelContentDocumentIfSameProcess();
     IgnoredErrorResult ignored;
     if (topDoc && !topDoc->HasFocus(ignored)) {
       doc->SetUseCounter(eUseCounter_custom_EnumerateDevicesUnfocused);

dom/payments/PaymentRequest.cpp

@@ -610,7 +610,7 @@ already_AddRefed<PaymentRequest> PaymentRequest::Constructor(
   }
 
   // Get the top level principal
-  nsCOMPtr<Document> topLevelDoc = doc->GetTopLevelContentDocument();
+  RefPtr<Document> topLevelDoc = doc->GetTopLevelContentDocumentIfSameProcess();
   MOZ_ASSERT(topLevelDoc);
   nsCOMPtr<nsIPrincipal> topLevelPrincipal = topLevelDoc->NodePrincipal();