Plumb invalidations from Tango to the extensions code for the Push Messaging API.

chrome/browser/extensions/api/push_messaging/push_messaging_invalidation_mapper.h

+// Copyright (c) 2012 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.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_API_PUSH_MESSAGING_PUSH_MESSAGING_INVALIDATION_MAPPER_H_
+#define CHROME_BROWSER_EXTENSIONS_API_PUSH_MESSAGING_PUSH_MESSAGING_INVALIDATION_MAPPER_H_
+
+#include <string>
+
+namespace extensions {
+
+// Interface for mapping extension IDs to object IDs.
+class PushMessagingInvalidationMapper {
+ public:
+  virtual ~PushMessagingInvalidationMapper() {}
+
+  // Register/unregister the object IDs associated with |extension_id|.
+  virtual void RegisterExtension(const std::string& extension_id) = 0;
+  virtual void UnregisterExtension(const std::string& extension_id) = 0;
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_PUSH_MESSAGING_PUSH_MESSAGING_INVALIDATION_MAPPER_H_