Add page load abort metrics to PageLoadMetrics system

components/page_load_metrics/browser/metrics_web_contents_observer_unittest.cc

 // Copyright (c) 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/page_load_metrics/browser/metrics_web_contents_observer.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/process/kill.h"
 #include "base/test/histogram_tester.h"
 #include "base/time/time.h"
@@ skipping 17 matching lines @@
     "PageLoad.Timing2.NavigationToDOMContentLoadedEventFired";
 const char kHistogramNameLoad[] =
     "PageLoad.Timing2.NavigationToLoadEventFired";
 
 const char kBGHistogramNameFirstLayout[] =
     "PageLoad.Timing2.NavigationToFirstLayout.BG";
 const char kBGHistogramNameDomContent[] =
     "PageLoad.Timing2.NavigationToDOMContentLoadedEventFired.BG";
 const char kBGHistogramNameLoad[] =
     "PageLoad.Timing2.NavigationToLoadEventFired.BG";
+
+const char kHistogramNameEvents[] = "PageLoad.EventCounts";
+
 }  //  namespace
 
 class MetricsWebContentsObserverTest
     : public content::RenderViewHostTestHarness {
  public:
   MetricsWebContentsObserverTest() {}
 
   void SetUp() override {
     RenderViewHostTestHarness::SetUp();
     observer_ = make_scoped_ptr(new MetricsWebContentsObserver(web_contents()));
@@ skipping 279 matching lines @@
 
   // Navigate again to see if the timing updated for a subframe message.
   web_contents_tester->NavigateAndCommit(GURL(kDefaultTestUrl));
 
   histogram_tester_.ExpectTotalCount(kHistogramNameDomContent, 0);
   histogram_tester_.ExpectTotalCount(kHistogramNameLoad, 0);
   histogram_tester_.ExpectTotalCount(kHistogramNameFirstLayout, 1);
   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