Generalize abort tracking to page end state tracking

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/browser/page_load_metrics/page_load_metrics_util.h"
 #include "chrome/test/base/testing_browser_process.h"
@@ skipping 86 matching lines @@
   histogram_tester().ExpectBucketCount(
       internal::kHistogramParseDuration,
       (parse_stop - parse_start).InMilliseconds(), 1);
   histogram_tester().ExpectBucketCount(
       internal::kHistogramParseBlockedOnScriptLoad,
       parse_script_load_duration.InMilliseconds(), 1);
   histogram_tester().ExpectBucketCount(
       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) {
   base::TimeDelta response = base::TimeDelta::FromMilliseconds(1);
   base::TimeDelta first_layout_1 = base::TimeDelta::FromMilliseconds(10);
   base::TimeDelta first_layout_2 = base::TimeDelta::FromMilliseconds(20);
   base::TimeDelta first_text_paint = base::TimeDelta::FromMilliseconds(30);
   base::TimeDelta first_contentful_paint = first_text_paint;
   base::TimeDelta dom_content = base::TimeDelta::FromMilliseconds(40);
   base::TimeDelta load = base::TimeDelta::FromMilliseconds(100);
@@ skipping 136 matching lines @@
 
   histogram_tester().ExpectTotalCount(internal::kBackgroundHistogramLoad, 0);
   histogram_tester().ExpectTotalCount(
       internal::kBackgroundHistogramFirstTextPaint, 1);
   histogram_tester().ExpectBucketCount(
       internal::kBackgroundHistogramFirstTextPaint,
       timing.first_text_paint.value().InMilliseconds(), 1);
 
   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) {
   // Set this event at 1 microsecond so it occurs before we foreground later in
   // the test.
   base::TimeDelta first_layout = base::TimeDelta::FromMicroseconds(1);
 
   page_load_metrics::PageLoadTiming timing;
   timing.navigation_start = base::Time::FromDoubleT(1);
   timing.first_layout = first_layout;
@@ skipping 265 matching lines @@
   NavigateAndCommit(GURL(kDefaultTestUrl2));
 
   histogram_tester().ExpectTotalCount(
       internal::kHistogramFirstMeaningfulPaint, 0);
   histogram_tester().ExpectTotalCount(
       internal::kHistogramParseStartToFirstMeaningfulPaint, 0);
   histogram_tester().ExpectBucketCount(
       internal::kHistogramFirstMeaningfulPaintStatus,
       internal::FIRST_MEANINGFUL_PAINT_USER_INTERACTION_BEFORE_FMP, 1);
 }