Persist Instance ID data to GCM store.

components/gcm_driver/gcm_client.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_H_
 #define COMPONENTS_GCM_DRIVER_GCM_CLIENT_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 291 matching lines @@
 
   // Removes the account mapping related to |account_id| from the persistent
   // store.
   virtual void RemoveAccountMapping(const std::string& account_id) = 0;
 
   // Sets last token fetch time in persistent store.
   virtual void SetLastTokenFetchTime(const base::Time& time) = 0;
 
   // Updates the timer used by the HeartbeatManager for sending heartbeats.
   virtual void UpdateHeartbeatTimer(scoped_ptr<base::Timer> timer) = 0;
+
+  // Adds the Instance ID data for a specific app to the persistent store.
+  virtual void AddInstanceIDData(const std::string& app_id,
+                                 const std::string& instance_id_data) = 0;
+
+  // Removes the Instance ID data for a specific app from the persistent store.
+  virtual void RemoveInstanceIDData(const std::string& app_id) = 0;
+
+  // Retrieves the Instance ID data for a specific app from the persistent
+  // store.
+  virtual std::string GetInstanceIDData(const std::string& app_id) = 0;
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_CLIENT_H_