Support getting and deleting token for Instance ID.

components/gcm_driver/gcm_stats_recorder_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_STATS_RECORDER_IMPL_H_
 #define COMPONENTS_GCM_DRIVER_GCM_STATS_RECORDER_IMPL_H_
 
 #include <deque>
 #include <string>
 #include <vector>
@@ skipping 37 matching lines @@
   void RecordCheckinDelayedDueToBackoff(int64 delay_msec) override;
   void RecordCheckinSuccess() override;
   void RecordCheckinFailure(std::string status, bool will_retry) override;
   void RecordConnectionInitiated(const std::string& host) override;
   void RecordConnectionDelayedDueToBackoff(int64 delay_msec) override;
   void RecordConnectionSuccess() override;
   void RecordConnectionFailure(int network_error) override;
   void RecordConnectionResetSignaled(
       ConnectionFactory::ConnectionResetReason reason) override;
   void RecordRegistrationSent(const std::string& app_id,
-                              const std::string& sender_ids) override;
+                              const std::string& senders) override;
   void RecordRegistrationResponse(const std::string& app_id,
-                                  const std::vector<std::string>& sender_ids,
+                                  const std::string& senders,
                                   RegistrationRequest::Status status) override;
   void RecordRegistrationRetryRequested(
       const std::string& app_id,
-      const std::vector<std::string>& sender_ids,
+      const std::string& senders,
       int retries_left) override;
   void RecordUnregistrationSent(const std::string& app_id) override;
   void RecordUnregistrationResponse(
       const std::string& app_id,
       UnregistrationRequest::Status status) override;
   void RecordUnregistrationRetryDelayed(const std::string& app_id,
                                         int64 delay_msec) override;
   void RecordDataMessageReceived(const std::string& app_id,
                                  const std::string& from,
                                  int message_byte_size,
@@ skipping 75 matching lines @@
   base::TimeTicks last_received_data_message_burst_start_time_;
   base::TimeTicks last_received_data_message_time_within_burst_;
   int64 received_data_message_burst_size_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMStatsRecorderImpl);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_STATS_RECORDER_IMPL_H_