Remove the provisional store and just store the staged log when writing to

components/metrics/metrics_log_manager.cc

 // 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.
 
 #include "components/metrics/metrics_log_manager.h"
 
 #include <algorithm>
 
 #include "base/metrics/histogram.h"
 #include "base/strings/string_util.h"
@@ skipping 97 matching lines @@
   switch (log_type) {
     case MetricsLog::INITIAL_STABILITY_LOG:
       initial_log_queue_.StoreLog(log_data);
       break;
     case MetricsLog::ONGOING_LOG:
       ongoing_log_queue_.StoreLog(log_data);
       break;
   }
 }
 
-void MetricsLogManager::StoreStagedLogAsUnsent(
-    PersistedLogs::StoreType store_type) {
-  DCHECK(has_staged_log());
-  if (initial_log_queue_.has_staged_log())
-    initial_log_queue_.StoreStagedLogAsUnsent(store_type);
-  else
-    ongoing_log_queue_.StoreStagedLogAsUnsent(store_type);
-}
-
-void MetricsLogManager::DiscardLastProvisionalStore() {
-  // We have at most one provisional store, (since at most one log is being
-  // uploaded at a time), so at least one of these will be a no-op.
-  initial_log_queue_.DiscardLastProvisionalStore();
-  ongoing_log_queue_.DiscardLastProvisionalStore();
-}
-
 void MetricsLogManager::PersistUnsentLogs() {
   DCHECK(unsent_logs_loaded_);
   if (!unsent_logs_loaded_)
     return;
 
   base::ElapsedTimer timer;
   initial_log_queue_.SerializeLogs();
   ongoing_log_queue_.SerializeLogs();
   UMA_HISTOGRAM_TIMES("UMA.StoreLogsTime", timer.Elapsed());
 }
 
 void MetricsLogManager::LoadPersistedUnsentLogs() {
   base::ElapsedTimer timer;
   initial_log_queue_.DeserializeLogs();
   ongoing_log_queue_.DeserializeLogs();
   UMA_HISTOGRAM_TIMES("UMA.LoadLogsTime", timer.Elapsed());
 
   unsent_logs_loaded_ = true;
 }
 
 }  // namespace metrics