[page_load_metrics] User Initiated Abort Tracking (Observer version)

components/page_load_metrics/browser/page_load_metrics_util.cc

Index: components/page_load_metrics/browser/page_load_metrics_util.cc
diff --git a/components/page_load_metrics/browser/page_load_metrics_util.cc b/components/page_load_metrics/browser/page_load_metrics_util.cc
index 9b641e52d0778bed7a72b0b39b2e0bb507f6cc91..495f762a9c7321e68aae4db7b83440dab2aecd62 100644
--- a/components/page_load_metrics/browser/page_load_metrics_util.cc
+++ b/components/page_load_metrics/browser/page_load_metrics_util.cc
@@ -18,5 +18,11 @@ base::TimeDelta GetFirstContentfulPaint(const PageLoadTiming& timing) {
   return std::min(timing.first_text_paint, timing.first_image_paint);
 }
 
+base::TimeDelta GetBackgroundDelta(const PageLoadExtraInfo& info) {
+  if (info.first_background_time.is_zero() && info.started_in_foreground)
+    return base::TimeDelta::Max();
+  return info.first_background_time;
+}
+
 }  // namespace page_load_metrics