From d1b9bdcfcca7b13c6903bdbdb33028106ad0c9cc Mon Sep 17 00:00:00 2001
From: Jan Varga <jvarga@mozilla.com>
Date: Wed, 2 Nov 2022 06:40:08 +0000
Subject: [PATCH] Bug 1798461 - Allow LastRelease definition in classes which
 inherit from WritableStream; r=saschanaz

Differential Revision: https://phabricator.services.mozilla.com/D160896
---
 dom/streams/WritableStream.cpp | 3 ++-
 dom/streams/WritableStream.h   | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/dom/streams/WritableStream.cpp b/dom/streams/WritableStream.cpp
index d299cfbaa2c6..2a49e67ed583 100644
--- a/dom/streams/WritableStream.cpp
+++ b/dom/streams/WritableStream.cpp
@@ -42,7 +42,8 @@ NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE_WITH_JS_MEMBERS(
     (mPendingAbortRequestReason, mStoredError))
 
 NS_IMPL_CYCLE_COLLECTING_ADDREF(WritableStream)
-NS_IMPL_CYCLE_COLLECTING_RELEASE(WritableStream)
+NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(WritableStream,
+                                                   LastRelease())
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(WritableStream)
   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
   NS_INTERFACE_MAP_ENTRY(nsISupports)
diff --git a/dom/streams/WritableStream.h b/dom/streams/WritableStream.h
index 325638e70de5..ebae34060d86 100644
--- a/dom/streams/WritableStream.h
+++ b/dom/streams/WritableStream.h
@@ -36,6 +36,8 @@ class WritableStream : public nsISupports, public nsWrapperCache {
  protected:
   virtual ~WritableStream();
 
+  virtual void LastRelease() {}
+
  public:
   explicit WritableStream(const GlobalObject& aGlobal);
   explicit WritableStream(nsIGlobalObject* aGlobal);