Persist Instance ID data to GCM store.

components/gcm_driver/gcm_client_impl.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 COMPONENTS_GCM_DRIVER_GCM_CLIENT_IMPL_H_
 #define COMPONENTS_GCM_DRIVER_GCM_CLIENT_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 108 matching lines @@
             const OutgoingMessage& message) override;
   void SetRecording(bool recording) override;
   void ClearActivityLogs() override;
   GCMStatistics GetStatistics() const override;
   void SetAccountTokens(
       const std::vector<AccountTokenInfo>& account_tokens) override;
   void UpdateAccountMapping(const AccountMapping& account_mapping) override;
   void RemoveAccountMapping(const std::string& account_id) override;
   void SetLastTokenFetchTime(const base::Time& time) override;
   void UpdateHeartbeatTimer(scoped_ptr<base::Timer> timer) override;
+  void AddInstanceIDData(const std::string& app_id,
+                         const std::string& instance_id_data) override;
+  void RemoveInstanceIDData(const std::string& app_id) override;
+  std::string GetInstanceIDData(const std::string& app_id) override;
 
   // GCMStatsRecorder::Delegate implemenation.
   void OnActivityRecorded() override;
 
   // ConnectionFactory::ConnectionListener implementation.
   void OnConnected(const GURL& current_server,
                    const net::IPEndPoint& ip_endpoint) override;
   void OnDisconnected() override;
 
  private:
@@ skipping 195 matching lines @@
   PendingUnregistrationRequests pending_unregistration_requests_;
   STLValueDeleter<PendingUnregistrationRequests>
       pending_unregistration_requests_deleter_;
 
   // G-services settings that were provided by MCS.
   GServicesSettings gservices_settings_;
 
   // Time of the last successful checkin.
   base::Time last_checkin_time_;
 
+  // Cached instance ID data, key is app id.
+  std::map<std::string, std::string> instance_id_data_;
+
   // Factory for creating references when scheduling periodic checkin.
   base::WeakPtrFactory<GCMClientImpl> periodic_checkin_ptr_factory_;
 
   // Factory for creating references in callbacks.
   base::WeakPtrFactory<GCMClientImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMClientImpl);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_CLIENT_IMPL_H_