Fix crash in structured metrics service

(cherry picked from commit 4fce644)

Bug: crbug.com/1450438
Change-Id: I804222a484aa4a7216b667deaeca4a9f39067020
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4585001
Commit-Queue: Andrew Bregger <andrewbregger@google.com>
Reviewed-by: Jong Ahn <jongahn@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1152789}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4598096
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/5790@{#460}
Cr-Branched-From: 1d71a33-refs/heads/main@{#1148114}

components/metrics/structured/structured_metrics_service.cc

@@ -123,7 +123,11 @@ base::TimeDelta StructuredMetricsService::GetUploadTimeInterval() {
 
 void StructuredMetricsService::RotateLogsAndSend() {
   DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
-  if (recorder_->events()->non_uma_events_size() == 0) {
+
+  // Verify that the recorder has been initialized and can be providing metrics.
+  // And if it is, then see if there are any events ready to be uploaded.
+  if (!recorder_->can_provide_metrics() ||
+      recorder_->events()->non_uma_events_size() == 0) {
     return;
   }