1 files changed, 35 insertions, 0 deletions
diff --git a/dom/plugins/ipc/PluginBackgroundDestroyer.cpp b/dom/plugins/ipc/PluginBackgroundDestroyer.cpp
new file mode 100644
index 0000000000..9c0b50d5e2
--- /dev/null
+++ b/dom/plugins/ipc/PluginBackgroundDestroyer.cpp
@@ -0,0 +1,35 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* 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 "PluginBackgroundDestroyer.h"
+#include "gfxSharedImageSurface.h"
+
+using namespace mozilla;
+using namespace plugins;
+
+PluginBackgroundDestroyerParent::PluginBackgroundDestroyerParent(
+    gfxASurface* aDyingBackground)
+    : mDyingBackground(aDyingBackground) {}
+
+PluginBackgroundDestroyerParent::~PluginBackgroundDestroyerParent() = default;
+
+void PluginBackgroundDestroyerParent::ActorDestroy(ActorDestroyReason why) {
+  switch (why) {
+    case Deletion:
+    case AncestorDeletion:
+      if (gfxSharedImageSurface::IsSharedImage(mDyingBackground)) {
+        gfxSharedImageSurface* s =
+            static_cast<gfxSharedImageSurface*>(mDyingBackground.get());
+        DeallocShmem(s->GetShmem());
+      }
+      break;
+    default:
+      // We're shutting down or crashed, let automatic cleanup
+      // take care of our shmem, if we have one.
+      break;
+  }
+}