From 41eb897104aba1f2127c593d7040e6ef0db684d5 Mon Sep 17 00:00:00 2001
From: Andreas Farre <farre@mozilla.com>
Date: Mon, 29 Apr 2019 07:01:38 +0000
Subject: [PATCH] Bug 1533447 - Part 1: Sync cached browsing contexts to
 non-owning child processes. r=nika

Differential Revision: https://phabricator.services.mozilla.com/D28668

--HG--
extra : moz-landing-system : lando
---
 dom/ipc/ContentParent.cpp | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/dom/ipc/ContentParent.cpp b/dom/ipc/ContentParent.cpp
index b228e0784e34..013b8dee52dd 100644
--- a/dom/ipc/ContentParent.cpp
+++ b/dom/ipc/ContentParent.cpp
@@ -5700,6 +5700,17 @@ mozilla::ipc::IPCResult ContentParent::RecvDetachBrowsingContext(
     aContext->Detach(/* aFromIPC */ true);
   }
 
+  for (auto iter = aContext->Group()->ContentParentsIter(); !iter.Done();
+       iter.Next()) {
+    nsRefPtrHashKey<ContentParent>* entry = iter.Get();
+    if (entry->GetKey() == this) {
+      continue;
+    }
+
+    Unused << entry->GetKey()->SendDetachBrowsingContext(aContext,
+                                                         aMoveToBFCache);
+  }
+
   return IPC_OK();
 }