[page_load_metrics] User Initiated Abort Tracking (Observer version)

components/page_load_metrics/browser/page_load_metrics_util.h

Index: components/page_load_metrics/browser/page_load_metrics_util.h
diff --git a/components/page_load_metrics/browser/page_load_metrics_util.h b/components/page_load_metrics/browser/page_load_metrics_util.h
index b5a569867db22bd488ace4ac2009a0f5f3b4a872..43b66fc4f41860de22a6d677babd68d7e00cd487 100644
--- a/components/page_load_metrics/browser/page_load_metrics_util.h
+++ b/components/page_load_metrics/browser/page_load_metrics_util.h
@@ -7,6 +7,7 @@
 
 #include "base/metrics/histogram_macros.h"
 #include "base/time/time.h"
+#include "components/page_load_metrics/browser/page_load_metrics_observer.h"
 
 #define PAGE_LOAD_HISTOGRAM(name, sample)                           \
   UMA_HISTOGRAM_CUSTOM_TIMES(name, sample,                          \
@@ -22,6 +23,14 @@ struct PageLoadTiming;
 // Painting of a background color is not considered 'contentful'.
 base::TimeDelta GetFirstContentfulPaint(const PageLoadTiming& timing);
 
+// Returns false for events for which we have no timing information, and events
+// that happened after the page was backgrounded. When a page is backgrounded,
+// some events (e.g. paint) are delayed. Since these data points can skew the
+// mean, they should not be mixed with timing events that occurred in the
+// foreground.
+bool EventOccurredInForeground(const base::TimeDelta& event,
+                               const PageLoadExtraInfo& info);
+
 }  // namespace page_load_metrics
 
 #endif  // COMPONENTS_PAGE_LOAD_METRICS_BROWSER_PAGE_LOAD_METRICS_UTIL_H_