Add page load abort metrics to PageLoadMetrics system

components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc

Index: components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc
diff --git a/components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc b/components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc
index c72e64715173cf43896fa6dba632859a79eeedfe..01d115cca428d0535d1a0820188f61cd019485a2 100644
--- a/components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc
+++ b/components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc
@@ -35,6 +35,9 @@ const char kBGHistogramNameDomContent[] =
     "PageLoad.Timing2.NavigationToDOMContentLoadedEventFired.BG";
 const char kBGHistogramNameLoad[] =
     "PageLoad.Timing2.NavigationToLoadEventFired.BG";
+
+const char kHistogramNameEvents[] = "PageLoad.EventCounts";
+
 }  //  namespace
 
 class MetricsWebContentsObserverTest
@@ -334,4 +337,64 @@ TEST_F(MetricsWebContentsObserverTest, DontBackgroundQuickerLoad) {
   histogram_tester_.ExpectBucketCount(kHistogramNameFirstLayout,
                                       first_layout.InMilliseconds(), 1);
 }
+
+TEST_F(MetricsWebContentsObserverTest, AbortProvisionalLoad) {
+  content::WebContentsTester* web_contents_tester =
+      content::WebContentsTester::For(web_contents());
+
+  web_contents_tester->StartNavigation(GURL(kDefaultTestUrl));
+  content::RenderFrameHostTester* rfh_tester =
+      content::RenderFrameHostTester::For(main_rfh());
+  rfh_tester->SimulateNavigationError(GURL(kDefaultTestUrl), net::ERR_ABORTED);
+  rfh_tester->SimulateNavigationStop();
+
+  histogram_tester_.ExpectBucketCount(kHistogramNameEvents,
+                                      STARTED_PROVISIONAL_LOAD, 1);
+  histogram_tester_.ExpectBucketCount(kHistogramNameEvents,
+                                      ABORTED_PROVISIONAL_LOAD, 1);
+}
+
+TEST_F(MetricsWebContentsObserverTest, AbortCommittedLoadBeforeFirstLayout) {
+  PageLoadTiming timing;
+  timing.navigation_start = base::Time::FromDoubleT(10);
+
+  content::WebContentsTester* web_contents_tester =
+      content::WebContentsTester::For(web_contents());
+  web_contents_tester->NavigateAndCommit(GURL(kDefaultTestUrl));
+
+  observer_->OnMessageReceived(
+      PageLoadMetricsMsg_TimingUpdated(observer_->routing_id(), timing),
+      main_rfh());
+  // Navigate again to force histogram logging.
+  web_contents_tester->NavigateAndCommit(GURL(kDefaultTestUrl2));
+
+  // 3 events: 2 starts and one abort before first layout.
+  histogram_tester_.ExpectBucketCount(kHistogramNameEvents,
+                                      STARTED_PROVISIONAL_LOAD, 2);
+  histogram_tester_.ExpectBucketCount(kHistogramNameEvents,
+                                      ABORTED_LOAD_BEFORE_FIRST_LAYOUT, 1);
+}
+
+TEST_F(MetricsWebContentsObserverTest, SuccessfulFirstLayoutEvent) {
+  PageLoadTiming timing;
+  timing.navigation_start = base::Time::FromDoubleT(10);
+  timing.first_layout = base::TimeDelta::FromMilliseconds(100);
+
+  content::WebContentsTester* web_contents_tester =
+      content::WebContentsTester::For(web_contents());
+  web_contents_tester->NavigateAndCommit(GURL(kDefaultTestUrl));
+
+  observer_->OnMessageReceived(
+      PageLoadMetricsMsg_TimingUpdated(observer_->routing_id(), timing),
+      main_rfh());
+  // Navigate again to force histogram logging.
+  web_contents_tester->NavigateAndCommit(GURL(kDefaultTestUrl2));
+
+  // 3 events: 2 starts and one successful first layout.
+  histogram_tester_.ExpectBucketCount(kHistogramNameEvents,
+                                      STARTED_PROVISIONAL_LOAD, 2);
+  histogram_tester_.ExpectBucketCount(kHistogramNameEvents,
+                                      SUCCESSFUL_FIRST_LAYOUT, 1);
+}
+
 }  // namespace page_load_metrics