[GCM] Check-in with signed in accounts associates device to user

google_apis/gcm/engine/gcm_store.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_GCM_STORE_H_
 #define GOOGLE_APIS_GCM_ENGINE_GCM_STORE_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 28 matching lines @@
 
     bool success;
     uint64 device_android_id;
     uint64 device_security_token;
     RegistrationInfoMap registrations;
     std::vector<std::string> incoming_messages;
     OutgoingMessageMap outgoing_messages;
     std::map<std::string, std::string> gservices_settings;
     std::string gservices_digest;
     base::Time last_checkin_time;
+    uint64 accounts_count;
   };
 
   typedef std::vector<std::string> PersistentIdList;
   typedef base::Callback<void(scoped_ptr<LoadResult> result)> LoadCallback;
   typedef base::Callback<void(bool success)> UpdateCallback;
 
   GCMStore();
   virtual ~GCMStore();
 
   // Load the data from persistent store and pass the initial state back to
@@ skipping 35 matching lines @@
                                   const UpdateCallback& callback) = 0;
   virtual void OverwriteOutgoingMessage(const std::string& persistent_id,
                                         const MCSMessage& message,
                                         const UpdateCallback& callback) = 0;
   virtual void RemoveOutgoingMessage(const std::string& persistent_id,
                                      const UpdateCallback& callback) = 0;
   virtual void RemoveOutgoingMessages(const PersistentIdList& persistent_ids,
                                       const UpdateCallback& callback) = 0;
 
   // Sets last device's checkin time.
-  virtual void SetLastCheckinTime(const base::Time& last_checkin_time,
+  virtual void SetLastCheckinInfo(const base::Time& last_checkin_time,
+                                  uint64 accounts_count,
                                   const UpdateCallback& callback) = 0;
 
   // G-service settings handling.
   // Persists |settings| and |settings_digest|. It completely replaces the
   // existing data.
   virtual void SetGServicesSettings(
       const std::map<std::string, std::string>& settings,
       const std::string& settings_digest,
       const UpdateCallback& callback) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(GCMStore);
 };
 
 }  // namespace gcm
 
 #endif  // GOOGLE_APIS_GCM_ENGINE_GCM_STORE_H_