1 files changed, 41 insertions, 0 deletions
diff --git a/dom/storage/PSessionStorageObserver.ipdl b/dom/storage/PSessionStorageObserver.ipdl
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+++ b/dom/storage/PSessionStorageObserver.ipdl
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+/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 8 -*- */
+/* vim: set sw=4 ts=8 et tw=80 ft=cpp : */
+/* 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 protocol PContent;
+
+namespace mozilla {
+namespace dom {
+
+/**
+ * Protocol used to relay chrome observer notifications related to clearing data
+ * to SessionStorageManager instances in content processes. A single instance is
+ * created by each content process when LocalStorage NextGen is enabled. When
+ * LSNG is disabled, the notifications are instead propagated via
+ * PBackgroundStorageChild. This does mean there are potentially slight ordering
+ * differences in when the notification will be received and processed. It's
+ * okay for this protocol to be managed by PContent rather than PBackground
+ * because these notifications are both rare and to-child-only. (Legacy
+ * LocalStorage was moved to PBackground from PContent because of parent-process
+ * main-thread contention for the processing of "parent:" messages in a very
+ * performance-sensitive context!)
+ */
+async protocol PSessionStorageObserver
+{
+  manager PContent;
+
+parent:
+  async DeleteMe();
+
+child:
+  async __delete__();
+
+  async Observe(nsCString topic,
+                nsString originAttributesPattern,
+                nsCString originScope);
+};
+
+}
+}