Generalize abort tracking to page end state tracking

chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer_unittest.cc

Index: chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer_unittest.cc
diff --git a/chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer_unittest.cc b/chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer_unittest.cc
index e8a7178e666a0408dfdd35a1dd02dec5c0cf924f..721217283885b8fe84e878faa4155183b413a83f 100644
--- a/chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer_unittest.cc
+++ b/chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer_unittest.cc
@@ -104,6 +104,10 @@ TEST_F(CorePageLoadMetricsObserverTest, SingleMetricAfterCommit) {
       internal::kHistogramParseBlockedOnScriptExecution,
       parse_script_exec_duration.InMilliseconds(), 1);
   histogram_tester().ExpectTotalCount(internal::kHistogramFirstTextPaint, 0);
+
+  histogram_tester().ExpectTotalCount(internal::kHistogramPageTimingPageEnd, 1);
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramPageTimingFirstBackground, 0);
 }
 
 TEST_F(CorePageLoadMetricsObserverTest, MultipleMetricsAfterCommits) {
@@ -260,6 +264,10 @@ TEST_F(CorePageLoadMetricsObserverTest, OnlyBackgroundLaterEvents) {
 
   histogram_tester().ExpectTotalCount(internal::kHistogramLoad, 0);
   histogram_tester().ExpectTotalCount(internal::kHistogramFirstTextPaint, 0);
+
+  histogram_tester().ExpectTotalCount(internal::kHistogramPageTimingPageEnd, 0);
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramPageTimingFirstBackground, 1);
 }
 
 TEST_F(CorePageLoadMetricsObserverTest, DontBackgroundQuickerLoad) {