Componentize invalidator storage + preferences

components/invalidation/invalidation_prefs.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/invalidation/invalidation_prefs.h"
+
+namespace invalidation {
+namespace prefs {
+
+// An ID to uniquely identify this client to the invalidator service.
+const char kInvalidatorClientId[] = "invalidator.client_id";
+
+// Opaque state from the invalidation subsystem that is persisted via prefs.
+// The value is base 64 encoded.
+const char kInvalidatorInvalidationState[] = "invalidator.invalidation_state";
+
+// List of received invalidations that have not been acted on by any clients
+// yet.  Used to keep invalidation clients in sync in case of a restart.
+const char kInvalidatorSavedInvalidations[] = "invalidator.saved_invalidations";
+
+}  // namespace prefs
+}  // namespace invalidation