1 files changed, 26 insertions, 0 deletions
diff --git a/dom/media/mediacontrol/MediaControlUtils.cpp b/dom/media/mediacontrol/MediaControlUtils.cpp
new file mode 100644
index 0000000000..090844e47c
--- /dev/null
+++ b/dom/media/mediacontrol/MediaControlUtils.cpp
@@ -0,0 +1,26 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "MediaControlUtils.h"
+
+#include "mozilla/dom/BrowsingContext.h"
+
+mozilla::LazyLogModule gMediaControlLog("MediaControl");
+
+namespace mozilla::dom {
+
+BrowsingContext* GetAliveTopBrowsingContext(BrowsingContext* aBC) {
+  if (!aBC || aBC->IsDiscarded()) {
+    return nullptr;
+  }
+  aBC = aBC->Top();
+  if (!aBC || aBC->IsDiscarded()) {
+    return nullptr;
+  }
+  return aBC;
+}
+
+}  // namespace mozilla::dom