1 files changed, 29 insertions, 0 deletions
diff --git a/layout/style/nsCSSRules.cpp b/layout/style/nsCSSRules.cpp
index 4b90b6f0c..dc79e471d 100644
--- a/layout/style/nsCSSRules.cpp
+++ b/layout/style/nsCSSRules.cpp
@@ -1515,6 +1515,13 @@ nsCSSFontFaceStyleDecl::GetParentObject()
   return ContainingRule()->GetDocument();
 }
 
+DocGroup*
+nsCSSFontFaceStyleDecl::GetDocGroup() const
+{
+  nsIDocument* document = ContainingRule()->GetDocument();
+  return document ? document->GetDocGroup() : nullptr;
+}
+
 JSObject*
 nsCSSFontFaceStyleDecl::WrapObject(JSContext *cx, JS::Handle<JSObject*> aGivenProto)
 {
@@ -1991,6 +1998,17 @@ nsCSSKeyframeStyleDeclaration::GetParentObject()
   return mRule ? mRule->GetDocument() : nullptr;
 }
 
+DocGroup*
+nsCSSKeyframeStyleDeclaration::GetDocGroup() const
+{
+  if (!mRule) {
+    return nullptr;
+  }
+
+  nsIDocument* document = mRule->GetDocument();
+  return document ? document->GetDocGroup() : nullptr;
+}
+
 // -------------------------------------------
 // nsCSSKeyframeRule
 //
@@ -2538,6 +2556,17 @@ nsCSSPageStyleDeclaration::GetParentObject()
   return mRule ? mRule->GetDocument() : nullptr;
 }
 
+DocGroup*
+nsCSSPageStyleDeclaration::GetDocGroup() const
+{
+  if (!mRule) {
+    return nullptr;
+  }
+
+  nsIDocument* document = mRule->GetDocument();
+  return document ? document->GetDocGroup() : nullptr;
+}
+
 // -------------------------------------------
 // nsCSSPageRule
 //