Revert of List message decryption failures on chrome://gcm-internals

components/gcm_driver/gcm_stats_recorder_impl.h

Index: components/gcm_driver/gcm_stats_recorder_impl.h
diff --git a/components/gcm_driver/gcm_stats_recorder_impl.h b/components/gcm_driver/gcm_stats_recorder_impl.h
index 5cbf63abc3e14090f37f32c5a2f5409d6e5b0f09..f92be116002885383dbf7fc09f619930df0f80cd 100644
--- a/components/gcm_driver/gcm_stats_recorder_impl.h
+++ b/components/gcm_driver/gcm_stats_recorder_impl.h
@@ -13,7 +13,6 @@
 
 #include "base/macros.h"
 #include "base/time/time.h"
-#include "components/gcm_driver/crypto/gcm_encryption_provider.h"
 #include "components/gcm_driver/gcm_activity.h"
 #include "google_apis/gcm/engine/connection_factory.h"
 #include "google_apis/gcm/engine/mcs_client.h"
@@ -38,10 +37,6 @@
 
   // Clear all recorded activities.
   void Clear();
-
-  // Records a message decryption failure caused by |reason| for |app_id|.
-  void RecordDecryptionFailure(const std::string& app_id,
-                               GCMEncryptionProvider::DecryptionFailure reason);
 
   // GCMStatsRecorder implementation:
   void RecordCheckinInitiated(uint64_t android_id) override;
@@ -114,10 +109,6 @@
   const std::deque<SendingActivity>& sending_activities() const {
     return sending_activities_;
   }
-  const std::deque<DecryptionFailureActivity>& decryption_failure_activities()
-      const {
-    return decryption_failure_activities_;
-  }
 
  protected:
   // Notify the recorder delegate, if it exists, that an activity has been
@@ -155,7 +146,6 @@
   std::deque<RegistrationActivity> registration_activities_;
   std::deque<ReceivingActivity> receiving_activities_;
   std::deque<SendingActivity> sending_activities_;
-  std::deque<DecryptionFailureActivity> decryption_failure_activities_;
 
   base::TimeTicks last_connection_initiation_time_;
   base::TimeTicks last_connection_success_time_;