Generalize the reload PLMO to support other transition types.

chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer_unittest.cc

 // Copyright 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 "chrome/browser/page_load_metrics/observers/core_page_load_metrics_observer.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/page_load_metrics/observers/page_load_metrics_observer_test_harness.h"
 #include "chrome/test/base/testing_browser_process.h"
 #include "components/page_load_metrics/browser/page_load_metrics_util.h"
@@ skipping 467 matching lines @@
           internal::kRapporMetricsNameCoarseTiming);
   const auto& string_it = sample_obj->string_fields.find("Domain");
   EXPECT_NE(string_it, sample_obj->string_fields.end());
   EXPECT_EQ(rappor::GetDomainAndRegistrySampleFromGURL(GURL(kDefaultTestUrl)),
             string_it->second);
 
   const auto& flag_it = sample_obj->flag_fields.find("IsSlow");
   EXPECT_NE(flag_it, sample_obj->flag_fields.end());
   EXPECT_EQ(0u, flag_it->second);
 }
+
+TEST_F(CorePageLoadMetricsObserverTest, Reload) {
+  page_load_metrics::PageLoadTiming timing;
+  timing.navigation_start = base::Time::FromDoubleT(1);
+  timing.first_contentful_paint = base::TimeDelta::FromMilliseconds(10);
+  PopulateRequiredTimingFields(&timing);
+
+  GURL url(kDefaultTestUrl);
+  NavigateWithPageTransitionAndCommit(url, ui::PAGE_TRANSITION_RELOAD);
+  SimulateTimingUpdate(timing);
+  NavigateAndCommit(url);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramLoadTypeFirstContentfulPaintReload, 1);
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramLoadTypeFirstContentfulPaintForwardBack, 0);
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramLoadTypeFirstContentfulPaintNewNavigation, 0);
+}
+
+TEST_F(CorePageLoadMetricsObserverTest, ForwardBack) {
+  page_load_metrics::PageLoadTiming timing;
+  timing.navigation_start = base::Time::FromDoubleT(1);
+  timing.first_contentful_paint = base::TimeDelta::FromMilliseconds(10);
+  PopulateRequiredTimingFields(&timing);
+
+  GURL url(kDefaultTestUrl);
+  NavigateWithPageTransitionAndCommit(
+      url, ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
+                                     ui::PAGE_TRANSITION_FORWARD_BACK));
+  SimulateTimingUpdate(timing);
+  NavigateAndCommit(url);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramLoadTypeFirstContentfulPaintReload, 0);
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramLoadTypeFirstContentfulPaintForwardBack, 1);
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramLoadTypeFirstContentfulPaintNewNavigation, 0);
+}
+
+TEST_F(CorePageLoadMetricsObserverTest, NewNavigation) {
+  page_load_metrics::PageLoadTiming timing;
+  timing.navigation_start = base::Time::FromDoubleT(1);
+  timing.first_contentful_paint = base::TimeDelta::FromMilliseconds(10);
+  PopulateRequiredTimingFields(&timing);
+
+  GURL url(kDefaultTestUrl);
+  NavigateWithPageTransitionAndCommit(url, ui::PAGE_TRANSITION_LINK);
+  SimulateTimingUpdate(timing);
+  NavigateAndCommit(url);
+
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramLoadTypeFirstContentfulPaintReload, 0);
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramLoadTypeFirstContentfulPaintForwardBack, 0);
+  histogram_tester().ExpectTotalCount(
+      internal::kHistogramLoadTypeFirstContentfulPaintNewNavigation, 1);
+}