1 files changed, 73 insertions, 0 deletions
diff --git a/toolkit/components/extensions/ExtensionsChild.cpp b/toolkit/components/extensions/ExtensionsChild.cpp
new file mode 100644
index 0000000000..258c2ed1b7
--- /dev/null
+++ b/toolkit/components/extensions/ExtensionsChild.cpp
@@ -0,0 +1,73 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
+/* 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 "mozilla/extensions/ExtensionsChild.h"
+#include "mozilla/extensions/ExtensionsParent.h"
+
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/dom/ContentChild.h"
+#include "mozilla/dom/InProcessChild.h"
+#include "mozilla/dom/InProcessParent.h"
+#include "mozilla/ipc/Endpoint.h"
+#include "nsXULAppAPI.h"
+
+using namespace mozilla::dom;
+
+namespace mozilla {
+namespace extensions {
+
+NS_IMPL_ISUPPORTS(ExtensionsChild, nsIObserver)
+
+/* static */
+ExtensionsChild& ExtensionsChild::Get() {
+  static RefPtr<ExtensionsChild> sInstance;
+
+  if (MOZ_UNLIKELY(!sInstance)) {
+    sInstance = new ExtensionsChild();
+    sInstance->Init();
+    ClearOnShutdown(&sInstance);
+  }
+  return *sInstance;
+}
+
+/* static */
+already_AddRefed<ExtensionsChild> ExtensionsChild::GetSingleton() {
+  return do_AddRef(&Get());
+}
+
+void ExtensionsChild::Init() {
+  if (XRE_IsContentProcess()) {
+    ContentChild::GetSingleton()->SendPExtensionsConstructor(this);
+  } else {
+    InProcessChild* ipChild = InProcessChild::Singleton();
+    InProcessParent* ipParent = InProcessParent::Singleton();
+    if (!ipChild || !ipParent) {
+      return;
+    }
+
+    RefPtr parent = new ExtensionsParent();
+
+    ManagedEndpoint<PExtensionsParent> endpoint =
+        ipChild->OpenPExtensionsEndpoint(this);
+    ipParent->BindPExtensionsEndpoint(std::move(endpoint), parent);
+  }
+}
+
+void ExtensionsChild::ActorDestroy(ActorDestroyReason aWhy) {}
+
+/* nsIObserver */
+
+NS_IMETHODIMP ExtensionsChild::Observe(nsISupports*, const char* aTopic,
+                                       const char16_t*) {
+  // Since this class is created at startup by the Category Manager, it's
+  // expected to implement nsIObserver; however, we have nothing interesting
+  // to do here.
+  MOZ_ASSERT(strcmp(aTopic, "app-startup") == 0);
+
+  return NS_OK;
+}
+
+}  // namespace extensions
+}  // namespace mozilla