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

components/metrics/metrics_service.cc

Index: components/metrics/metrics_service.cc
diff --git a/components/metrics/metrics_service.cc b/components/metrics/metrics_service.cc
index 925421fea799a8078234565b91068f9c81b28937..aa76bf45a9d977b642ee12b9cd6a783ee2a0205f 100644
--- a/components/metrics/metrics_service.cc
+++ b/components/metrics/metrics_service.cc
@@ -773,16 +773,6 @@ void MetricsService::PushPendingLogsToPersistentStorage() {
   if (state_ < SENDING_INITIAL_STABILITY_LOG)
     return;  // We didn't and still don't have time to get plugin list etc.
 
-  if (log_manager_.has_staged_log()) {
-    // We may race here, and send second copy of the log later.
-    metrics::PersistedLogs::StoreType store_type;
-    if (log_upload_in_progress_)
-      store_type = metrics::PersistedLogs::PROVISIONAL_STORE;
-    else
-      store_type = metrics::PersistedLogs::NORMAL_STORE;
-    log_manager_.StoreStagedLogAsUnsent(store_type);
-  }
-  DCHECK(!log_manager_.has_staged_log());
   CloseCurrentLog();
   log_manager_.PersistUnsentLogs();
 
@@ -1035,10 +1025,6 @@ void MetricsService::OnLogUploadComplete(int response_code) {
                             ResponseCodeToStatus(response_code),
                             NUM_RESPONSE_STATUSES);
 
-  // If the upload was provisionally stored, drop it now that the upload is
-  // known to have gone through.
-  log_manager_.DiscardLastProvisionalStore();
-
   bool upload_succeeded = response_code == 200;
 
   // Provide boolean for error recovery (allow us to ignore response_code).