From 5e7917e2c8bd50754535652014c1de0054841912 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <email@mattatobin.com>
Date: Sat, 13 Jun 2020 08:23:21 -0400
Subject: Bug 1429656 - Implement ShadowRoot.activeElement

Tag #1375
---
 dom/base/FragmentOrElement.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'dom/base/FragmentOrElement.cpp')

diff --git a/dom/base/FragmentOrElement.cpp b/dom/base/FragmentOrElement.cpp
index 6fbe04d25..e33d3c63a 100644
--- a/dom/base/FragmentOrElement.cpp
+++ b/dom/base/FragmentOrElement.cpp
@@ -1138,6 +1138,15 @@ FragmentOrElement::GetAssignedSlot() const
   return slots ? slots->mAssignedSlot.get() : nullptr;
 }
 
+nsIContent*
+nsIContent::GetContainingShadowHost() const
+{
+  if (mozilla::dom::ShadowRoot* shadow = GetContainingShadow()) {
+    return shadow->GetHost();
+  }
+  return nullptr;
+}
+
 void
 FragmentOrElement::SetAssignedSlot(HTMLSlotElement* aSlot)
 {
-- 
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