[GCM] Move registration info persistence from extension state store to GCM store

google_apis/gcm/engine/registration_info.h

+// 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.
+
+#ifndef GOOGLE_APIS_GCM_ENGINE_REGISTRATION_INFO_H_
+#define GOOGLE_APIS_GCM_ENGINE_REGISTRATION_INFO_H_
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "google_apis/gcm/base/gcm_export.h"
+
+namespace gcm {
+
+struct GCM_EXPORT RegistrationInfo {
+  RegistrationInfo();
+  ~RegistrationInfo();
+
+  std::string SerializeAsString() const;
+  bool ParseFromString(const std::string& value);
+
+  std::vector<std::string> sender_ids;
+  std::string registration_id;
+};
+
+// Map of app id to registration info.
+typedef std::map<std::string, RegistrationInfo> RegistrationInfoMap;

[Nicolas Zea, 2014/03/21 19:52:40]

Not a huge deal, but this is going to be fairly inefficient. As changes are made
to the map, the RegistrationInfo objects are going to be copied around by value
repeatedly as the map modifies it's internal shape. Raw or linked_ptr's might be
a better option.

+
+}  // namespace gcm
+
+#endif  // GOOGLE_APIS_GCM_ENGINE_REGISTRATION_INFO_H_