Reset the GCM store to recover from it when it is busted

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 180 matching lines @@
   // initialization.
   void OnLoadCompleted(scoped_ptr<GCMStore::LoadResult> result);
   // Starts the GCM.
   void StartGCM();
   // Initializes mcs_client_, which handles the connection to MCS.
   void InitializeMCSClient();
   // Complets the first time device checkin.
   void OnFirstTimeDeviceCheckinCompleted(const CheckinInfo& checkin_info);
   // Starts a login on mcs_client_.
   void StartMCSLogin();
-  // Resets state to before initialization.
-  void ResetState();
+  // Resets the GCM store when it is corrupted.
+  void ResetStore();
   // Sets state to ready. This will initiate the MCS login and notify the
   // delegates.
   void OnReady(const std::vector<AccountMapping>& account_mappings,
                const base::Time& last_token_fetch_time);
 
   // Starts a first time device checkin.
   void StartCheckin();
   // Completes the device checkin request by parsing the |checkin_response|.
   // Function also cleans up the pending checkin.
   void OnCheckinCompleted(
@@ skipping 17 matching lines @@
   // Callback for persisting registration info in the |gcm_store_|.
   void UpdateRegistrationCallback(bool success);
 
   // Callback for all store operations that do not try to recover, if write in
   // |gcm_store_| fails.
   void DefaultStoreCallback(bool success);
 
   // Callback for store operation where result does not matter.
   void IgnoreWriteResultCallback(bool success);
 
+  // Callback for resetting the GCM store.
+  void ResetStoreCallback(bool success);
+
   // Completes the registration request.
   void OnRegisterCompleted(const std::string& app_id,
                            const std::vector<std::string>& sender_ids,
                            RegistrationRequest::Status status,
                            const std::string& registration_id);
 
   // Completes the unregistration request.
   void OnUnregisterCompleted(const std::string& app_id,
                              UnregistrationRequest::Status status);
 
@@ skipping 46 matching lines @@
   // TODO(fgorski): Check if it can be passed in constructor and made const.
   ChromeBuildInfo chrome_build_info_;
 
   // Persistent data store for keeping device credentials, messages and user to
   // serial number mappings.
   scoped_ptr<GCMStore> gcm_store_;
 
   // Data loaded from the GCM store.
   scoped_ptr<GCMStore::LoadResult> load_result_;
 
+  // Tracks if the GCM store has been reset. This is used to prevent from
+  // resetting and loading from the store again and again.
+  bool gcm_store_reset_;
+
   scoped_refptr<net::HttpNetworkSession> network_session_;
   net::BoundNetLog net_log_;
   scoped_ptr<ConnectionFactory> connection_factory_;
   scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_;
 
   // Controls receiving and sending of packets and reliable message queueing.
   scoped_ptr<MCSClient> mcs_client_;
 
   scoped_ptr<CheckinRequest> checkin_request_;
 
@@ skipping 23 matching lines @@
 
   // 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_